private void nextQuestionButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_nextQuestionButtonActionPerformed

        if(answersGroup.getSelection() == null) {
            //Here we could show the dialog saying that user must select something
        } else {
            Knowledge.checkSimilarityForQuestion(questionNumberLabel.getText());
        }
       
    }//GEN-LAST:event_nextQuestionButtonActionPerformed