public class JDBCUtil {
    private static Connection CONNECTION;

    static {
        try {
            Class.forName("org.postgresql.Driver");
        } catch (ClassNotFoundException ex){
            ex.printStackTrace();
        }
    }

    public static Connection getConnection() {
        CONNECTION = null;
        try {
            CONNECTION = DriverManager.getConnection("jdbc:postgresql://localhost:5432/musicLibrary", "postgres", "qwe123");
        } catch (SQLException ex){
            System.out.println(ex.getMessage());
        }
        return CONNECTION;
    }
}