public void openConnection() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            this.connnection = DriverManager.getConnection("jdbc:mysql://46.251.239.17/java_db", "root", "PRIVAT");
            System.out.println("Connection established successfully with the database server.");
        } catch (Exception e) {
            System.err.println("Error: " + e.getMessage());
        }
    }