code: @Override
      public void commit(final Xid _xid,
                         final boolean _onePhase)
      {
          if (JDBCStoreResource.LOG.isDebugEnabled()) {
              JDBCStoreResource.LOG.debug("commit (xid = " + _xid + ", one phase = " + _onePhase + ")");
          }
      }
docs: The method is called from the transaction manager if the complete
  transaction is completed.<br/> Nothing is to do here, because the
  commitment is done by the {@link ConnectionResource} instance.
  
  @param _xid  global transaction identifier (not used, because each file
  with the file id gets a new VFS store resource instance)
  @param _onePhase <i>true</i> if it is a one phase commitment transaction
  (not used)