public static void close(Connection con, PreparedStatement ps, ResultSet rs) { close(con); close(ps); close(rs);
public static void close(Connection con) { if (con != null) try { con.close(); } catch (SQLException e) { LOG.warn("Could not close connection", e); }
    public static void close(Connection con, PreparedStatement ps, ResultSet rs) {        close(con);        close(ps);        close(rs);    }