@@ -0,0 +1,415 @@
+package com.github.ac31007_group_8.quiz.util;%0A%0A/**%0A * A simple Pair class, without using javafx.%0A *%0A * @author Robert T.%0A */%0Apublic class Pair%3CA, B%3E %7B%0A%0A    public final A first;%0A    public final B second;%0A%0A    public Pair(A first, B second) %7B%0A        this.first = first;%0A        this.second = second;%0A    %7D%0A%0A    @Override%0A    public String toString() %7B%0A        return %22Pair%3C%22 + first + %22, %22 + second + %22%3E%22;%0A    %7D%0A%7D%0A

Add basic Pair class.