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 true;
                }
                return false;
            }
        };
    }
    /**
     *	Answer the string to display as the label for the source specification field
     */
    protected String getSourceLabel() {
        return DataTransferMessages.ArchiveImport_fromFile;
    }
    /**
     *	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 ZipFile getSpecifiedZipSourceFile() {
        return getSpecifiedZipSourceFile(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 ZipFile getSpecifiedZipSourceFile(String fileName) {
        if (fileName.length() == 0) {
			return null;
		}
        try {