diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index db8bd6c..62d5c4b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -156,8 +156,31 @@ jobs:
           test -f gradle.properties
           test -f gradle/verification-metadata.xml
 
-      - name: Build release distribution and SBOM
-        run: ./gradlew --no-daemon clean build pmdMain javadoc jacocoTestReport distZip cyclonedxBom
+      - name: Build release distribution, signed Maven bundle, and SBOM
+        run: ./gradlew --no-daemon clean build pmdMain javadoc jacocoTestReport distZip cyclonedxBom centralBundle
+
+      - name: Publish bundle to Maven Central
+        shell: bash
+        env:
+          CENTRAL_BEARER_TOKEN: ${{ secrets.CENTRAL_BEARER_TOKEN }}
+        run: |
+          set -euo pipefail
+          echo "::add-mask::$CENTRAL_BEARER_TOKEN"
+
+          BUNDLE="$(ls build/central-bundle/*.zip)"
+          HEADER_FILE="$(mktemp)"
+          trap 'rm -f "$HEADER_FILE"' EXIT
+          printf 'Authorization: Bearer %s\n' "$CENTRAL_BEARER_TOKEN" > "$HEADER_FILE"
+
+          curl \
+            --fail \
+            --silent \
+            --show-error \
+            --request POST \
+            --header @"$HEADER_FILE" \
+            --form "bundle=@${BUNDLE}" \
+            --form "name=org.egothor:radixor:${GITHUB_REF_NAME#release@}" \
+            "https://central.sonatype.com/api/v1/publisher/upload?publishingType=AUTOMATIC"
 
       - name: Publish GitHub release assets
         uses: softprops/action-gh-release@v2
@@ -167,3 +190,4 @@ jobs:
             build/distributions/*.zip
             build/reports/sbom/radixor-sbom.json
             build/reports/sbom/radixor-sbom.xml
+            build/central-bundle/*.zip
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index f493e7d..9157f33 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -48,7 +48,7 @@ jobs:
 
       - name: Set up Gradle caching and instrumentation
         uses: gradle/actions/setup-gradle@v4
-		 
+
       - name: Verify reproducibility inputs
         shell: bash
         run: |
diff --git a/LICENSE b/LICENSE
index 808e688..b752302 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,31 +1,28 @@
 Copyright (C) 2026, Leo Galambos
 All rights reserved.
 
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
 
-1. Redistributions of source code must retain the above copyright notice, this
-   list of conditions and the following disclaimer.
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
 
 2. Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.
 
-3. All advertising materials mentioning features or use of this software must
-   display the following acknowledgement:
-   This product includes software developed by the Egothor project.
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
 
-4. Neither the name of the copyright holder nor the names of its contributors
-   may be used to endorse or promote products derived from this software without
-   specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
diff --git a/build.gradle b/build.gradle
index 994c7c7..c0fe029 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,6 +2,8 @@ plugins {
     id 'java'
     id 'eclipse'
     id 'application'
+    id 'maven-publish'
+    id 'signing'
     id 'pmd'
     id 'jacoco'
     id 'info.solidsoft.pitest' version '1.19.0'
@@ -11,7 +13,7 @@ plugins {
     id 'com.palantir.git-version' version '4.0.0'
 }
 
-group = 'org.egothor.stemmer'
+group = 'org.egothor'
 version = gitVersion(prefix:'release@')
 
 def benchmarkReportsDirectory = layout.buildDirectory.dir('reports/jmh')
@@ -21,11 +23,23 @@ def nvdApiKey = providers.gradleProperty('nvdApiKey')
         .orElse(providers.environmentVariable('NVD_API_KEY'))
         .orNull
 def dependencyCheckSuppressionFile = rootProject.file('dependency-suppression.xml')
- 
+
+apply from: 'gradle/maven-pom.gradle'
+
 configurations {
     mockitoAgent
 }
 
+java {
+    withSourcesJar()
+    withJavadocJar()
+}
+
+tasks.withType(AbstractArchiveTask).configureEach {
+    preserveFileTimestamps = false
+    reproducibleFileOrder = true
+}
+
 jacoco {
     toolVersion = '0.8.14'
 }
diff --git a/gradle.properties b/gradle.properties
index a47b4eb..fc8f725 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1,19 @@
 org.gradle.dependency.verification=strict
+
+pomName=Radixor
+pomDescription=Fast algorithmic stemming with compact patch-command tries in the Egothor tradition.
+pomLicenseDistribution=repo
+
+mavenArtifactId=radixor
+
+pomDeveloperId=egothor
+pomDeveloperName=Leo Galambos
+pomDeveloperEmail=egothor@gmail.com
+
+pomUrl=https://github.com/leogalambos/Radixor
+pomScmUrl=https://github.com/leogalambos/Radixor
+pomScmConnection=scm:git:https://github.com/leogalambos/Radixor.git
+pomScmDeveloperConnection=scm:git:ssh://git@github.com/leogalambos/Radixor.git
+
+pomLicenseName=BSD-3-Clause
+pomLicenseUrl=https://spdx.org/licenses/BSD-3-Clause.html
diff --git a/gradle/maven-pom.gradle b/gradle/maven-pom.gradle
new file mode 100644
index 0000000..906d14e
--- /dev/null
+++ b/gradle/maven-pom.gradle
@@ -0,0 +1,144 @@
+import java.security.MessageDigest
+
+def publicationArtifactId = providers.gradleProperty('mavenArtifactId').orElse('radixor').get()
+
+def pomName = providers.gradleProperty('pomName').orElse('Radixor').get()
+def pomDescription = providers.gradleProperty('pomDescription')
+        .orElse('Fast algorithmic stemming with compact patch-command tries in the Egothor tradition.')
+        .get()
+def pomUrl = providers.gradleProperty('pomUrl').orNull
+def pomScmUrl = providers.gradleProperty('pomScmUrl').orNull
+def pomScmConnection = providers.gradleProperty('pomScmConnection').orNull
+def pomScmDeveloperConnection = providers.gradleProperty('pomScmDeveloperConnection').orNull
+def pomLicenseName = providers.gradleProperty('pomLicenseName').orNull
+def pomLicenseUrl = providers.gradleProperty('pomLicenseUrl').orNull
+def pomLicenseDistribution = providers.gradleProperty('pomLicenseDistribution').orElse('repo').get()
+def pomDeveloperId = providers.gradleProperty('pomDeveloperId').orElse('egothor').get()
+def pomDeveloperName = providers.gradleProperty('pomDeveloperName').orElse('Leo Galambos').get()
+def pomDeveloperEmail = providers.gradleProperty('pomDeveloperEmail').orElse('egothor@gmail.com').get()
+
+def signingKey = providers.gradleProperty('pomSigningKey')
+        .orElse(providers.environmentVariable('SIGNING_KEY'))
+        .orNull
+
+def signingPassword = providers.gradleProperty('pomSigningPassword')
+        .orElse(providers.environmentVariable('SIGNING_PASSWORD'))
+        .orNull
+
+def centralStagingRepositoryDirectory = layout.buildDirectory.dir('staging-repository')
+def centralBundleDirectory = layout.buildDirectory.dir('central-bundle')
+
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            from components.java
+            artifactId = publicationArtifactId
+
+            pom {
+                name = pomName
+                description = pomDescription
+                url = pomUrl
+
+                licenses {
+                    license {
+                        name = pomLicenseName
+                        url = pomLicenseUrl
+                        distribution = pomLicenseDistribution
+                    }
+                }
+
+                developers {
+                    developer {
+                        id = pomDeveloperId
+                        name = pomDeveloperName
+                        email = pomDeveloperEmail
+                    }
+                }
+
+                scm {
+                    url = pomScmUrl
+                    connection = pomScmConnection
+                    developerConnection = pomScmDeveloperConnection
+                }
+            }
+        }
+    }
+
+    repositories {
+        maven {
+            name = 'centralStaging'
+            url = centralStagingRepositoryDirectory.get().asFile.toURI()
+        }
+    }
+}
+
+signing {
+    required { !version.toString().endsWith('-SNAPSHOT') }
+    if (signingKey != null && !signingKey.isBlank()) {
+        useInMemoryPgpKeys(signingKey, signingPassword)
+        sign publishing.publications.mavenJava
+    }
+}
+
+tasks.register('validateReleaseMetadata') {
+    group = 'publishing'
+    description = 'Validates release metadata and signing inputs required for Maven bundle generation.'
+
+    doLast {
+        List<String> missing = new ArrayList<>()
+
+        if (pomUrl == null || pomUrl.isBlank()) missing.add('pomUrl')
+        if (pomScmUrl == null || pomScmUrl.isBlank()) missing.add('pomScmUrl')
+        if (pomScmConnection == null || pomScmConnection.isBlank()) missing.add('pomScmConnection')
+        if (pomScmDeveloperConnection == null || pomScmDeveloperConnection.isBlank()) missing.add('pomScmDeveloperConnection')
+        if (pomLicenseName == null || pomLicenseName.isBlank()) missing.add('pomLicenseName')
+        if (pomLicenseUrl == null || pomLicenseUrl.isBlank()) missing.add('pomLicenseUrl')
+        if (signingKey == null || signingKey.isBlank()) missing.add('pomSigningKey / SIGNING_KEY')
+        if (signingPassword == null || signingPassword.isBlank()) missing.add('pomSigningPassword / SIGNING_PASSWORD')
+
+        if (!missing.isEmpty()) {
+            throw new GradleException('Missing release metadata: ' + String.join(', ', missing))
+        }
+    }
+}
+
+tasks.named('publishMavenJavaPublicationToCentralStagingRepository') {
+    dependsOn(tasks.named('validateReleaseMetadata'))
+}
+
+tasks.register('createCentralChecksums') {
+    group = 'publishing'
+    description = 'Creates MD5 and SHA-1 checksums for staged Maven publication artifacts.'
+    dependsOn(tasks.named('publishMavenJavaPublicationToCentralStagingRepository'))
+
+    doLast {
+        File root = centralStagingRepositoryDirectory.get().asFile
+        root.eachFileRecurse { File file ->
+            if (file.isFile() && !file.name.endsWith('.md5') && !file.name.endsWith('.sha1')) {
+                byte[] bytes = file.bytes
+                new File(file.absolutePath + '.md5').text =
+                        MessageDigest.getInstance('MD5').digest(bytes).encodeHex().toString()
+                new File(file.absolutePath + '.sha1').text =
+                        MessageDigest.getInstance('SHA-1').digest(bytes).encodeHex().toString()
+            }
+        }
+    }
+}
+
+tasks.register('centralBundle', Zip) {
+    group = 'publishing'
+    description = 'Builds a Maven Central-compatible deployment bundle ZIP.'
+
+    dependsOn(tasks.named('createCentralChecksums'))
+
+    from(centralStagingRepositoryDirectory)
+    destinationDirectory = centralBundleDirectory
+    archiveFileName = "radixor-${project.version}-central-bundle.zip"
+}
+
+tasks.register('packageReleaseCandidate') {
+    group = 'publishing'
+    description = 'Builds the signed local Central bundle without uploading it.'
+    dependsOn(tasks.named('clean'))
+    dependsOn(tasks.named('centralBundle'))
+}
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/BenchmarkCorpusSupport.java b/src/jmh/java/org/egothor/stemmer/benchmark/BenchmarkCorpusSupport.java
index f335861..d815814 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/BenchmarkCorpusSupport.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/BenchmarkCorpusSupport.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.io.IOException;
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/EnglishComparisonCorpus.java b/src/jmh/java/org/egothor/stemmer/benchmark/EnglishComparisonCorpus.java
index 67fa05d..bb99a19 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/EnglishComparisonCorpus.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/EnglishComparisonCorpus.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.util.ArrayList;
@@ -107,4 +137,4 @@ final class EnglishComparisonCorpus {
     private static String suffix(final int value) {
         return Integer.toString(value, Character.MAX_RADIX);
     }
-}
\ No newline at end of file
+}
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/EnglishStemmerComparisonBenchmark.java b/src/jmh/java/org/egothor/stemmer/benchmark/EnglishStemmerComparisonBenchmark.java
index 27a6921..1618b53 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/EnglishStemmerComparisonBenchmark.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/EnglishStemmerComparisonBenchmark.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.io.IOException;
@@ -165,4 +195,4 @@ public class EnglishStemmerComparisonBenchmark {
             blackhole.consume(stemmer.stem(token));
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieCompilationBenchmark.java b/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieCompilationBenchmark.java
index d77b461..874cabd 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieCompilationBenchmark.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieCompilationBenchmark.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.io.IOException;
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieLookupBenchmark.java b/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieLookupBenchmark.java
index 3325af3..cc19e4f 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieLookupBenchmark.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/FrequencyTrieLookupBenchmark.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.io.IOException;
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/SnowballStemmerAdapter.java b/src/jmh/java/org/egothor/stemmer/benchmark/SnowballStemmerAdapter.java
index 0ff678c..12bd12a 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/SnowballStemmerAdapter.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/SnowballStemmerAdapter.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.benchmark;
 
 import java.util.Objects;
@@ -54,4 +84,4 @@ final class SnowballStemmerAdapter {
         this.stemmer.stem();
         return this.stemmer.getCurrent();
     }
-}
\ No newline at end of file
+}
diff --git a/src/jmh/java/org/egothor/stemmer/benchmark/package-info.java b/src/jmh/java/org/egothor/stemmer/benchmark/package-info.java
index 592bf60..708058a 100644
--- a/src/jmh/java/org/egothor/stemmer/benchmark/package-info.java
+++ b/src/jmh/java/org/egothor/stemmer/benchmark/package-info.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 /**
  * JMH benchmarks for the Radixor algorithmic core.
  *
diff --git a/src/main/java/org/egothor/stemmer/Compile.java b/src/main/java/org/egothor/stemmer/Compile.java
index 3d86a62..71ae0df 100644
--- a/src/main/java/org/egothor/stemmer/Compile.java
+++ b/src/main/java/org/egothor/stemmer/Compile.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/FrequencyTrie.java b/src/main/java/org/egothor/stemmer/FrequencyTrie.java
index 25dc953..03d9d40 100644
--- a/src/main/java/org/egothor/stemmer/FrequencyTrie.java
+++ b/src/main/java/org/egothor/stemmer/FrequencyTrie.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/FrequencyTrieBuilders.java b/src/main/java/org/egothor/stemmer/FrequencyTrieBuilders.java
index bfba98b..b56e066 100644
--- a/src/main/java/org/egothor/stemmer/FrequencyTrieBuilders.java
+++ b/src/main/java/org/egothor/stemmer/FrequencyTrieBuilders.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/PatchCommandEncoder.java b/src/main/java/org/egothor/stemmer/PatchCommandEncoder.java
index ba24935..a91aa99 100644
--- a/src/main/java/org/egothor/stemmer/PatchCommandEncoder.java
+++ b/src/main/java/org/egothor/stemmer/PatchCommandEncoder.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/ReductionMode.java b/src/main/java/org/egothor/stemmer/ReductionMode.java
index 122820d..7965a25 100644
--- a/src/main/java/org/egothor/stemmer/ReductionMode.java
+++ b/src/main/java/org/egothor/stemmer/ReductionMode.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/ReductionSettings.java b/src/main/java/org/egothor/stemmer/ReductionSettings.java
index faa7756..d6e47dd 100644
--- a/src/main/java/org/egothor/stemmer/ReductionSettings.java
+++ b/src/main/java/org/egothor/stemmer/ReductionSettings.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/StemmerDictionaryParser.java b/src/main/java/org/egothor/stemmer/StemmerDictionaryParser.java
index e058de0..6e298ed 100644
--- a/src/main/java/org/egothor/stemmer/StemmerDictionaryParser.java
+++ b/src/main/java/org/egothor/stemmer/StemmerDictionaryParser.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/StemmerPatchTrieBinaryIO.java b/src/main/java/org/egothor/stemmer/StemmerPatchTrieBinaryIO.java
index 18e485c..01e8a90 100644
--- a/src/main/java/org/egothor/stemmer/StemmerPatchTrieBinaryIO.java
+++ b/src/main/java/org/egothor/stemmer/StemmerPatchTrieBinaryIO.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/StemmerPatchTrieLoader.java b/src/main/java/org/egothor/stemmer/StemmerPatchTrieLoader.java
index 4d83f6c..a7c34fb 100644
--- a/src/main/java/org/egothor/stemmer/StemmerPatchTrieLoader.java
+++ b/src/main/java/org/egothor/stemmer/StemmerPatchTrieLoader.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/ValueCount.java b/src/main/java/org/egothor/stemmer/ValueCount.java
index c991071..99f79e9 100644
--- a/src/main/java/org/egothor/stemmer/ValueCount.java
+++ b/src/main/java/org/egothor/stemmer/ValueCount.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/package-info.java b/src/main/java/org/egothor/stemmer/package-info.java
index 7866400..9f39cc3 100644
--- a/src/main/java/org/egothor/stemmer/package-info.java
+++ b/src/main/java/org/egothor/stemmer/package-info.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 /**
  * Provides the core Egothor-style stemming infrastructure based on compact
  * patch-command tries.
diff --git a/src/main/java/org/egothor/stemmer/trie/ChildDescriptor.java b/src/main/java/org/egothor/stemmer/trie/ChildDescriptor.java
index 7210cac..0b65b9e 100644
--- a/src/main/java/org/egothor/stemmer/trie/ChildDescriptor.java
+++ b/src/main/java/org/egothor/stemmer/trie/ChildDescriptor.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/CompiledNode.java b/src/main/java/org/egothor/stemmer/trie/CompiledNode.java
index 21d846e..6612cd8 100644
--- a/src/main/java/org/egothor/stemmer/trie/CompiledNode.java
+++ b/src/main/java/org/egothor/stemmer/trie/CompiledNode.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/DominantLocalDescriptor.java b/src/main/java/org/egothor/stemmer/trie/DominantLocalDescriptor.java
index 2330ec3..5be2a9a 100644
--- a/src/main/java/org/egothor/stemmer/trie/DominantLocalDescriptor.java
+++ b/src/main/java/org/egothor/stemmer/trie/DominantLocalDescriptor.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/LocalValueSummary.java b/src/main/java/org/egothor/stemmer/trie/LocalValueSummary.java
index cf4de31..fd15947 100644
--- a/src/main/java/org/egothor/stemmer/trie/LocalValueSummary.java
+++ b/src/main/java/org/egothor/stemmer/trie/LocalValueSummary.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/MutableNode.java b/src/main/java/org/egothor/stemmer/trie/MutableNode.java
index e7b5958..291b603 100644
--- a/src/main/java/org/egothor/stemmer/trie/MutableNode.java
+++ b/src/main/java/org/egothor/stemmer/trie/MutableNode.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/NodeData.java b/src/main/java/org/egothor/stemmer/trie/NodeData.java
index 5745c82..6a8aa76 100644
--- a/src/main/java/org/egothor/stemmer/trie/NodeData.java
+++ b/src/main/java/org/egothor/stemmer/trie/NodeData.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/RankedLocalDescriptor.java b/src/main/java/org/egothor/stemmer/trie/RankedLocalDescriptor.java
index 9e10f7a..5d7a331 100644
--- a/src/main/java/org/egothor/stemmer/trie/RankedLocalDescriptor.java
+++ b/src/main/java/org/egothor/stemmer/trie/RankedLocalDescriptor.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/ReducedNode.java b/src/main/java/org/egothor/stemmer/trie/ReducedNode.java
index 587d43c..2430a9d 100644
--- a/src/main/java/org/egothor/stemmer/trie/ReducedNode.java
+++ b/src/main/java/org/egothor/stemmer/trie/ReducedNode.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/ReductionContext.java b/src/main/java/org/egothor/stemmer/trie/ReductionContext.java
index 18c6912..c668752 100644
--- a/src/main/java/org/egothor/stemmer/trie/ReductionContext.java
+++ b/src/main/java/org/egothor/stemmer/trie/ReductionContext.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/ReductionSignature.java b/src/main/java/org/egothor/stemmer/trie/ReductionSignature.java
index dc952f1..3518c01 100644
--- a/src/main/java/org/egothor/stemmer/trie/ReductionSignature.java
+++ b/src/main/java/org/egothor/stemmer/trie/ReductionSignature.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/SortableValue.java b/src/main/java/org/egothor/stemmer/trie/SortableValue.java
index 4e1e5f4..5e5347f 100644
--- a/src/main/java/org/egothor/stemmer/trie/SortableValue.java
+++ b/src/main/java/org/egothor/stemmer/trie/SortableValue.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/UnorderedLocalDescriptor.java b/src/main/java/org/egothor/stemmer/trie/UnorderedLocalDescriptor.java
index a9109cd..5124b38 100644
--- a/src/main/java/org/egothor/stemmer/trie/UnorderedLocalDescriptor.java
+++ b/src/main/java/org/egothor/stemmer/trie/UnorderedLocalDescriptor.java
@@ -12,11 +12,7 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 
- * 3. All advertising materials mentioning features or use of this software must
- *    display the following acknowledgement:
- *    This product includes software developed by the Egothor project.
- * 
- * 4. Neither the name of the copyright holder nor the names of its contributors
+ * 3. Neither the name of the copyright holder nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  * 
diff --git a/src/main/java/org/egothor/stemmer/trie/package-info.java b/src/main/java/org/egothor/stemmer/trie/package-info.java
index 2f3f70a..ee0c262 100644
--- a/src/main/java/org/egothor/stemmer/trie/package-info.java
+++ b/src/main/java/org/egothor/stemmer/trie/package-info.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 /**
  * Provides internal trie infrastructure used by
  * {@link org.egothor.stemmer.FrequencyTrie} compilation, reduction,
@@ -71,4 +101,4 @@
  * immutable lookup.
  * </p>
  */
-package org.egothor.stemmer.trie;
\ No newline at end of file
+package org.egothor.stemmer.trie;
diff --git a/src/test/java/org/egothor/stemmer/CompileIntegrationTest.java b/src/test/java/org/egothor/stemmer/CompileIntegrationTest.java
index 2dd68bc..8ead79b 100644
--- a/src/test/java/org/egothor/stemmer/CompileIntegrationTest.java
+++ b/src/test/java/org/egothor/stemmer/CompileIntegrationTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -515,4 +545,4 @@ final class CompileIntegrationTest {
      */
     private record CommandResult(int exitCode, String standardError) {
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/CompileTest.java b/src/test/java/org/egothor/stemmer/CompileTest.java
index a240776..bd64b57 100644
--- a/src/test/java/org/egothor/stemmer/CompileTest.java
+++ b/src/test/java/org/egothor/stemmer/CompileTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -349,4 +379,4 @@ class CompileTest {
     private record CommandResult(int exitCode, String standardError) {
         // No additional members.
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/CompiledTrieArtifactRegressionTest.java b/src/test/java/org/egothor/stemmer/CompiledTrieArtifactRegressionTest.java
index 4a1ebe0..f3d633d 100644
--- a/src/test/java/org/egothor/stemmer/CompiledTrieArtifactRegressionTest.java
+++ b/src/test/java/org/egothor/stemmer/CompiledTrieArtifactRegressionTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -254,4 +284,4 @@ final class CompiledTrieArtifactRegressionTest {
      */
     private record ProbeExpectation(String word, String preferredStem, List<String> acceptableStems) {
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/FrequencyTrieBuildersTest.java b/src/test/java/org/egothor/stemmer/FrequencyTrieBuildersTest.java
index 5f5df12..51a23c0 100644
--- a/src/test/java/org/egothor/stemmer/FrequencyTrieBuildersTest.java
+++ b/src/test/java/org/egothor/stemmer/FrequencyTrieBuildersTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -311,4 +341,4 @@ class FrequencyTrieBuildersTest {
                 () -> assertIterableEquals(expected.getEntries(key), actual.getEntries(key),
                         "Unexpected getEntries() result for key '" + key + "'."));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/FrequencyTrieTest.java b/src/test/java/org/egothor/stemmer/FrequencyTrieTest.java
index b35a630..8e9ba59 100644
--- a/src/test/java/org/egothor/stemmer/FrequencyTrieTest.java
+++ b/src/test/java/org/egothor/stemmer/FrequencyTrieTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -769,4 +799,4 @@ class FrequencyTrieTest {
             throw new IllegalStateException("Unexpected I/O while building synthetic trie stream.", exception);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/PatchCommandEncoderTest.java b/src/test/java/org/egothor/stemmer/PatchCommandEncoderTest.java
index 7cfad4e..e0ab19c 100644
--- a/src/test/java/org/egothor/stemmer/PatchCommandEncoderTest.java
+++ b/src/test/java/org/egothor/stemmer/PatchCommandEncoderTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -665,4 +695,4 @@ class PatchCommandEncoderTest {
                         () -> "Case " + caseId + " failed in mirrored orientation for reversedSource='" + reversedSource
                                 + "', reversedTarget='" + reversedTarget + "', patch='" + reversedPatch + "'."));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/RegressionArtifactGenerator.java b/src/test/java/org/egothor/stemmer/RegressionArtifactGenerator.java
index c3acd7d..6e73a0a 100644
--- a/src/test/java/org/egothor/stemmer/RegressionArtifactGenerator.java
+++ b/src/test/java/org/egothor/stemmer/RegressionArtifactGenerator.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import java.io.IOException;
@@ -220,4 +250,4 @@ public final class RegressionArtifactGenerator {
             return args[valueIndex];
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/RegressionArtifactSupport.java b/src/test/java/org/egothor/stemmer/RegressionArtifactSupport.java
index efd5ff2..4b46892 100644
--- a/src/test/java/org/egothor/stemmer/RegressionArtifactSupport.java
+++ b/src/test/java/org/egothor/stemmer/RegressionArtifactSupport.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import java.io.ByteArrayOutputStream;
@@ -214,4 +244,4 @@ final class RegressionArtifactSupport {
         }
         return -1;
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/StemmerDictionaryParserTest.java b/src/test/java/org/egothor/stemmer/StemmerDictionaryParserTest.java
index b4a4f1a..40382f5 100644
--- a/src/test/java/org/egothor/stemmer/StemmerDictionaryParserTest.java
+++ b/src/test/java/org/egothor/stemmer/StemmerDictionaryParserTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -323,4 +353,4 @@ class StemmerDictionaryParserTest {
                     () -> new StemmerDictionaryParser.ParseStatistics("source", 0, 0, -1));
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/StemmerPatchTrieBinaryIOTest.java b/src/test/java/org/egothor/stemmer/StemmerPatchTrieBinaryIOTest.java
index 6625d07..a7171c0 100644
--- a/src/test/java/org/egothor/stemmer/StemmerPatchTrieBinaryIOTest.java
+++ b/src/test/java/org/egothor/stemmer/StemmerPatchTrieBinaryIOTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -509,4 +539,4 @@ class StemmerPatchTrieBinaryIOTest {
             return this.closed;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/StemmerPatchTrieLoaderTest.java b/src/test/java/org/egothor/stemmer/StemmerPatchTrieLoaderTest.java
index 2f3fa14..57fee50 100644
--- a/src/test/java/org/egothor/stemmer/StemmerPatchTrieLoaderTest.java
+++ b/src/test/java/org/egothor/stemmer/StemmerPatchTrieLoaderTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer;
 
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -729,4 +759,4 @@ final class StemmerPatchTrieLoaderTest {
          */
         void execute() throws Exception;
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/ChildDescriptorTest.java b/src/test/java/org/egothor/stemmer/trie/ChildDescriptorTest.java
index f3611a9..069a4a3 100644
--- a/src/test/java/org/egothor/stemmer/trie/ChildDescriptorTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/ChildDescriptorTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -45,4 +75,4 @@ class ChildDescriptorTest {
         return ReductionSignature.create(summary, Map.of(),
                 ReductionSettings.withDefaults(ReductionMode.MERGE_SUBTREES_WITH_EQUIVALENT_RANKED_GET_ALL_RESULTS));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/DominantLocalDescriptorTest.java b/src/test/java/org/egothor/stemmer/trie/DominantLocalDescriptorTest.java
index 97ba2ef..aaa250c 100644
--- a/src/test/java/org/egothor/stemmer/trie/DominantLocalDescriptorTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/DominantLocalDescriptorTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -38,4 +68,4 @@ class DominantLocalDescriptorTest {
         assertEquals(descriptor, equalDescriptor);
         assertEquals(descriptor.hashCode(), equalDescriptor.hashCode());
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/LocalValueSummaryTest.java b/src/test/java/org/egothor/stemmer/trie/LocalValueSummaryTest.java
index a9d7d37..bf9ab6c 100644
--- a/src/test/java/org/egothor/stemmer/trie/LocalValueSummaryTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/LocalValueSummaryTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
@@ -181,4 +211,4 @@ class LocalValueSummaryTest {
             return this.text;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/MutableNodeTest.java b/src/test/java/org/egothor/stemmer/trie/MutableNodeTest.java
index a1c1a12..56dc468 100644
--- a/src/test/java/org/egothor/stemmer/trie/MutableNodeTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/MutableNodeTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -51,4 +81,4 @@ class MutableNodeTest {
         assertSame(valueCounts, node.valueCounts());
         assertEquals(Integer.valueOf(3), node.valueCounts().get("stem"));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/RankedLocalDescriptorTest.java b/src/test/java/org/egothor/stemmer/trie/RankedLocalDescriptorTest.java
index a66e117..446a0c9 100644
--- a/src/test/java/org/egothor/stemmer/trie/RankedLocalDescriptorTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/RankedLocalDescriptorTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -39,4 +69,4 @@ class RankedLocalDescriptorTest {
 
         assertEquals(descriptor, RankedLocalDescriptor.of(new Object[] { "a", "b" }));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/ReducedNodeTest.java b/src/test/java/org/egothor/stemmer/trie/ReducedNodeTest.java
index 77ed473..b93a01e 100644
--- a/src/test/java/org/egothor/stemmer/trie/ReducedNodeTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/ReducedNodeTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -130,4 +160,4 @@ class ReducedNodeTest {
         return new ReducedNode<>(createLeafSignature(value), new LinkedHashMap<>(Map.of(value, 1)),
                 new LinkedHashMap<>());
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/ReductionContextTest.java b/src/test/java/org/egothor/stemmer/trie/ReductionContextTest.java
index 5348b2a..96b729c 100644
--- a/src/test/java/org/egothor/stemmer/trie/ReductionContextTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/ReductionContextTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -68,4 +98,4 @@ class ReductionContextTest {
         return ReductionSignature.create(summary, Map.of(),
                 ReductionSettings.withDefaults(ReductionMode.MERGE_SUBTREES_WITH_EQUIVALENT_RANKED_GET_ALL_RESULTS));
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/ReductionSignatureTest.java b/src/test/java/org/egothor/stemmer/trie/ReductionSignatureTest.java
index f32e0cb..d4a8b56 100644
--- a/src/test/java/org/egothor/stemmer/trie/ReductionSignatureTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/ReductionSignatureTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -152,4 +182,4 @@ class ReductionSignatureTest {
     private static ReducedNode<String> createReducedLeaf(final String value) {
         return new ReducedNode<>(createLeafSignature(value), Map.of(value, 1), Map.of());
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/java/org/egothor/stemmer/trie/UnorderedLocalDescriptorTest.java b/src/test/java/org/egothor/stemmer/trie/UnorderedLocalDescriptorTest.java
index 59167ca..664ce23 100644
--- a/src/test/java/org/egothor/stemmer/trie/UnorderedLocalDescriptorTest.java
+++ b/src/test/java/org/egothor/stemmer/trie/UnorderedLocalDescriptorTest.java
@@ -1,3 +1,33 @@
+/*******************************************************************************
+ * Copyright (C) 2026, Leo Galambos
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ ******************************************************************************/
 package org.egothor.stemmer.trie;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -39,4 +69,4 @@ class UnorderedLocalDescriptorTest {
 
         assertEquals(descriptor, UnorderedLocalDescriptor.of(new Object[] { "a", "b" }));
     }
-}
\ No newline at end of file
+}