private void executeQuery(String query, Connection conn) throws TableUpdateException {
		if (query.length() > 0) {
			PreparedStatement ps = null;
	
			try {
				ps = conn.prepareStatement(query);
				ps.executeUpdate();
			} catch (SQLException e) {
				throw new TableUpdateException(e.getMessage());
			} finally {
				dbCon.close(ps);
			}
		}
	}