public void collect(Connection conn, PreparedStatement st, ResultSet res) {
		if (res != null) {
			try {
				res.close();
			} catch (SQLException e) {
			}
		}
		if (st != null) {
			try {
				st.close();
			} catch (SQLException e) {
			}
		}
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
			}
		}
	}