public static void closeQuietly(Writer output) {
        closeQuietly((Closeable) output);
    }
Unconditionally close a <code>Writer</code>.
<p>
Equivalent to {@link Writer#close()}, except any exceptions will be ignored.
This is typically used in finally blocks.
<p>
Example code:
<pre>
  Writer out = null;
  try {
      out = new StringWriter();
      out.write("Hello World");
      out.close(); //close errors are handled
  } catch (Exception e) {
      // error handling
  } finally {
      IOUtils.closeQuietly(out);
  }
</pre>

@param output the Writer to close, may be null or already closed
pay-java-common/src/main/java/com/egzosn/pay/common/util/IOUtils.java