}

      @Override
      public void tearDown() throws IOException {
        factory.tearDown();
      }
    };
  }

  public static CharSinkFactory asCharSinkFactory(ByteSinkFactory factory) {
    checkNotNull(factory);
    return new CharSinkFactory() {
      @Override
      public CharSink createSink() throws IOException {
        return factory.createSink().asCharSink(UTF_8);