@Override
  public synchronized void close() throws IOException {
    mCloser.close();
  }
@Test
  public void createClose() throws IOException, AlluxioException {
    AlluxioURI ufsPath = getUfsPath();
    mFileSystem.createFile(ufsPath).close();
    assertFalse(mFileSystem.getStatus(ufsPath).isFolder());
    assertEquals(0L, mFileSystem.getStatus(ufsPath).getLength());
  }