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 false;
    	}
    	ZipFile zipFile = getSpecifiedZipSourceFile(fileName);
    	if(zipFile != null) {
    		ArchiveFileManipulations.closeZipFile(zipFile, getShell());
    		return true;
    	}
    	return false;
    }
    /**
     *	Answer a boolean indicating whether the specified source currently exists
     *	and is valid (ie.- proper format)
     */
    private boolean ensureZipSourceIsValid() {
        ZipFile specifiedFile = getSpecifiedZipSourceFile();
        if (specifiedFile == null) {
            return false;
        }
        return ArchiveFileManipulations.closeZipFile(specifiedFile, getShell());
    }
    private boolean ensureTarSourceIsValid() {
    	TarFile specifiedFile = getSpecifiedTarSourceFile();
    	if( specifiedFile == null ) {
    		return false;
    	}
    	return ArchiveFileManipulations.closeTarFile(specifiedFile, getShell());
    }
    /**
     *	Answer a boolean indicating whether the specified source currently exists