code: Connection getSingleConnection() {
          Connection connection = null;
          try {
              Class.forName(driver);
              connection = DriverManager.getConnection(url, user, password);
          } catch (SQLException e) {
              throw new InitializationException("Could not initialize the connection", e);
          } catch (ClassNotFoundException e) {
              throw new InitializationException("Could not find the driver class", e);
          }
          return connection;
      }
docs: Gets the connection.
  
  @return the connection