PackageElement elementPackage = elementUtils.getPackageOf(element);
// the javadoc
String doc = elementUtils.getDocComment(element);
// build a new class name
String className = elementPackage.getQualifiedName() + "." + name + "_Doc";
messager.printMessage(Kind.NOTE, "Class: " + className);
try {
// now write the new class which will be compiled in the
// same run
JavaFileObject sourceFile = processingEnv.getFiler().createSourceFile(className, element);
Writer writer = sourceFile.openWriter();