code: @Override
  	public void shutdown() {
  		if (detectChanges) {
  			es.shutdown();
  			try {
  				if (!es.awaitTermination(1000, TimeUnit.MILLISECONDS)) {
  					es.shutdownNow();
  				}
  			} catch (InterruptedException e) {
  				es.shutdownNow();
  			}
  		}
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.store.SqlManager#shutdown()