EDIT

    boolean isShowCheckListPerspective = false;

    boolean isShowTaxonNodeWizard = true;

    ICdmRepository controller = null;

    /**

     * {@inheritDoc}

     */

    protected Control createContents(Composite parent) {

        final Composite composite = new Composite(parent, SWT.NULL);

//        GridLayout gridLayout = new GridLayout();

//        composite.setLayout(gridLayout);

//        controller = CdmStore.getCurrentApplicationConfiguration();

//              }

//         });

        return composite;

    }

    @Override

    public boolean performOk() {

       //ICdmRepository controller = CdmStore.getCurrentApplicationConfiguration();

       if (controller != null){

           IPreferenceService service = controller.getPreferenceService();