Fix missing javadoc parameters, throw tags,...

libsrc/ffdec_lib/src/com/jpexs/helpers/plugin/CharSequenceJavaFileObject.java

@@ -49,8 +49,8 @@ public class CharSequenceJavaFileObject extends SimpleJavaFileObject {
      * Answers the CharSequence to be compiled. It will give the source code
      * stored in variable "content"
      *
-     * @param ignoreEncodingErrors
-     * @return
+     * @param ignoreEncodingErrors Ignore encoding errors
+     * @return CharSequence
      */
     @Override
     public CharSequence getCharContent(boolean ignoreEncodingErrors) {

libsrc/ffdec_lib/src/com/jpexs/helpers/plugin/JavaClassObject.java

@@ -63,8 +63,8 @@ public class JavaClassObject extends SimpleJavaFileObject {
      * array. This way the compiler will write everything into the byte array
      * that we will instantiate later
      *
-     * @return
-     * @throws java.io.IOException
+     * @return Output stream
+     * @throws IOException On I/O error
      */
     @Override
     public OutputStream openOutputStream() throws IOException {