}

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

  public static CharSourceFactory asCharSourceFactory(final ByteSourceFactory factory) {
    checkNotNull(factory);
    return new CharSourceFactory() {
      @Override
      public CharSource createSource(String string) throws IOException {

      }

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

  public static CharSourceFactory asCharSourceFactory(final ByteSourceFactory factory) {
    checkNotNull(factory);
    return new CharSourceFactory() {
      @Override
      public CharSource createSource(String string) throws IOException {