Connection DB MYSQL + Singleton

package utilitaire;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class ConnectionDB {

    private static Connection connection;

    static {

        try {

            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test" , "root" , "");

        } catch (ClassNotFoundException | SQLException e) {
            throw new RuntimeException("not connected " ,e);
        }
    }

    public static Connection getConnection() {
        return connection;
    }
}