Bug 221649 [Import/Export] ZipFileImportWizard has no option to change the FILE_IMPORT_MASK
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/datatransfer/ZipFileImportWizard.java
private IWorkbench workbench;
    private IStructuredSelection selection;
    private WizardArchiveFileResourceImportPage1 mainPage;
    /**
     * Creates a wizard for importing resources into the workspace from
     * a zip file.
     */
    public ZipFileImportWizard() {
        AbstractUIPlugin plugin = WorkbenchPlugin.getDefault();
        IDialogSettings workbenchSettings = plugin.getDialogSettings();
        IDialogSettings section = workbenchSettings
                .getSection("ZipFileImportWizard");
        if (section == null) {
			section = workbenchSettings.addNewSection("ZipFileImportWizard");
		}
        setDialogSettings(section);
    }
    /* (non-Javadoc)
     * Method declared on IWizard.
     */
    public void addPages() {
        super.addPages();
        mainPage = new WizardArchiveFileResourceImportPage1(workbench, selection);