docs: @Override
  	public boolean isConnected() {
  		try {
  			ResultSet rs = executeSelectSQL("SELECT 1", null);
  			if (rs.next()) {
  				return true;
  			}
  			return false;
  		} catch (DatabaseException e) {
  			e.printStackTrace();
  			return false;
  		} catch (SQLException e) {
  			e.printStackTrace();
  			return false;
  		}
  
  	}