code: @SuppressWarnings("deprecation")
  	@Override
  	public void save(final OutputStream out, final String comments) {
  		lock.readLock().lock();
  		try {
  			properties.save(out, comments);
  		} finally {
  			lock.readLock().unlock();
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see java.util.Properties#save(java.io.OutputStream, java.lang.String)