fixes java doc warnings

Author: appiepollo14

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java

@@ -204,6 +204,9 @@ public void codeGenForkOptions(Action<? super JavaForkOptions> action) {
 
     /**
      * Returns the last file from the specified {@link FileCollection}.
+     *
+     * @param fileCollection the collection of files present in the directory
+     * @return result returns the last file
      */
     public static File getLastFile(FileCollection fileCollection) {
         File result = null;

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusDev.java

@@ -142,6 +142,8 @@ public QuarkusDev(
     /**
      * The dependency Configuration associated with this task. Used
      * for up-to-date checks
+     *
+     * @return quarkusDevConfiguration returns the configuration
      */
     @SuppressWarnings("unused")
     @CompileClasspath
@@ -151,6 +153,8 @@ public Configuration getQuarkusDevConfiguration() {
 
     /**
      * The JVM sources (Java, Kotlin, ..) for the project
+     *
+     * @return the FileCollection of all java source files present in the source directories
      */
     @Optional
     @InputFiles
@@ -161,6 +165,8 @@ public FileCollection getSources() {
 
     /**
      * The JVM classes directory (compilation output)
+     *
+     * @return the FileCollection of all java source files present in the source directories
      */
     @Optional
     @InputFiles
@@ -174,6 +180,8 @@ public FileCollection getCompilationOutput() {
      *
      * Defaults to the main source set's classes directory. If there are
      * multiple, one is picked at random (see {@link QuarkusPluginExtension#getLastFile}).
+     *
+     * @return workingDirectory
      */
     @Input
     public Property<File> getWorkingDirectory() {
@@ -204,6 +212,7 @@ public Property<Boolean> getPreventNoVerify() {
     }
 
     /**
+     * @return boolean value of getPreventNoVerify()
      * @deprecated see {@link #getPreventNoVerify()}
      */
     @SuppressWarnings("SpellCheckingInspection")