@Override
public void edit(Map<String, Object> parameters, HttpServletResponse response) throws IOException {
String fileName = (String) parameters.get("fileName");
parameters.put("mp3", new Mp3(new File(new DirectoriesModel("music").getDirectoryPath()+fileName)));
parameters.put("genres", new Mp3Genres().asList());
merge("mp3/edit.freemarker", parameters, response.getWriter());
}