public boolean closeConnection(Connection con) {
		if (con != null)
			try {
				con.close();
			} catch (SQLException e) {
				String msg = "[ERROR] Could not close jdbc connection.";
				System.out.println(msg);
				System.out.println(e.getErrorCode() + ": " + e.getMessage());
				return false;
			}
		return true;
	}