code: public static void closeQuietly(@Nullable Connection con) {
  		try {
  			close(con);
  		} catch (SQLException e) {
  			Loggers.get(Connections.class).log(SEVERE, "closing connection", e);
  		}
  	}
docs: {@link #close(Connection) Close} the connection and log any exceptions instead of throwing
  them.
  
  @param con
  may be null