Fix checkstyle issues

Author: ascopes

.github/workflows/build.yml

@@ -58,7 +58,7 @@ jobs:
 
       - name: Compile and run tests
         shell: bash
-        run: ./mvnw -B -U -Dcheckstyle.skip=true -Dlicense.skip=true clean verify
+        run: ./mvnw -B -U clean verify
 
       - name: Upload to codecov
         uses: codecov/codecov-action@v4

java-compiler-testing/src/main/java/io/github/ascopes/jct/containers/impl/AbstractPackageContainerGroup.java

@@ -277,7 +277,7 @@ public Set<JavaFileObject> listFileObjects(
   }
 
   /**
-   * {@inheritdoc}
+   * List all files in the group.
    *
    * @return all files in a multimap.
    * @throws IOException if an IO exception occurs reading the file system.

java-compiler-testing/src/main/java/io/github/ascopes/jct/utils/ModuleDiscoverer.java

@@ -72,6 +72,7 @@ public static Set<ModuleCandidate> findModulesIn(Path path) {
 
   /**
    * Representation of a candidate module that was discovered.
+   *
    * @since 3.0.2
    */
   public static final class ModuleCandidate {