code: @Override
  	protected RrdBackend open(String path, boolean readOnly) throws IOException {
  		return new RrdNioBackend(path, readOnly, syncPeriod);
  	}
docs: Creates RrdNioBackend object for the given file path.
  
  @param path	 File path
  @param readOnly True, if the file should be accessed in read/only mode.
  False otherwise.
  @return RrdNioBackend object which handles all I/O operations for the given file path
  @throws IOException Thrown in case of I/O error.