private void jButtonRemoveActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButtonRemoveActionPerformed
        Iterator<SignatureFile> it = this.model.getSelectedFiles().iterator();

        while (it.hasNext()) {
            this.model.remove(it.next());
        }
        this.model.fireTableDataChanged();


        try {
            DataBase.getInstance().save();
        } catch (Exception ex) {
            Logger.getLogger(UserInterface.class.getName()).log(Level.SEVERE, null, ex);
        }

    }//GEN-LAST:event_jButtonRemoveActionPerformed