class FilterFileSystem extends FileSystem {

  @Override
  public FSDataOutputStream create(Path f, FsPermission permission,
      boolean overwrite, int bufferSize, short replication, long blockSize,
      Progressable progress) throws IOException {
    return fs.create(f, permission,
        overwrite, bufferSize, replication, blockSize, progress);
  }

  public  FilterFileSystem();
  public  FilterFileSystem(FileSystem fs);

}