Bug 221649 [Import/Export] ZipFileImportWizard has no option to change the FILE_IMPORT_MASK
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardArchiveFileResourceImportPage1.java
return new ZipFile(fileName);
        } catch (ZipException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_badFormat);
        } catch (IOException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);
        }
        sourceNameField.setFocus();
        return null;
    }
    /**
     *	Answer a handle to the zip file currently specified as being the source.
     *	Return null if this file does not exist or is not of valid format.
     */
    protected TarFile getSpecifiedTarSourceFile() {
        return getSpecifiedTarSourceFile(sourceNameField.getText());
    }
    /**
     *	Answer a handle to the zip file currently specified as being the source.
     *	Return null if this file does not exist or is not of valid format.
     */
    private TarFile getSpecifiedTarSourceFile(String fileName) {
        if (fileName.length() == 0) {
			return null;
		}
        try {
            return new TarFile(fileName);
        } catch (TarException e) {
        	displayErrorDialog(DataTransferMessages.TarImport_badFormat);
        } catch (IOException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);