code: public static Map<String, String> getFilelisteners() throws FileNotFoundException, IOException,
          ClassNotFoundException {
  
          mFilelistenerToPaths = new HashMap<String, String>();
  
          File listenerFilePaths = new File(StorageManager.ROOT_PATH + File.separator + "mapping.data");
  
          getFileListenersFromSystem(listenerFilePaths);
  
          return mFilelistenerToPaths;
      }
docs: A utility method to get all filelisteners that are already defined and
  stored.
  
  @return returns a map of relative paths to the folders as the keyset and
  the resourcenames that point to the configurations in the
  valueset.
  @throws FileNotFoundException
  @throws IOException
  @throws ClassNotFoundException