code: public synchronized void close()
  	{
  		if (s != null) {
  			super.close();
  			try {
  				s.close();
  			}
  			catch (final IOException e) {}
  			s = null;
  		}
  	}
docs: /* (non-Javadoc)
  @see tuwien.auto.calimero.log.LogStreamWriter#close()