@Override
  public void flush() throws IOException {
    // noop
  }
Writes an <code>int</code> to the underlying output stream as four bytes, high byte first.
@param i the <code>int</code> to write
@throws IOException if an I/O error occurs.
hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java