if (files == null) return;
	private void deleteCopies(String fileName, String exceptionNumber) {		String notToDelete = fileName + '.' + exceptionNumber;		String[] files = base.list();		for (int i = 0; i < files.length; i++) {			if (files[i].startsWith(fileName + '.') && !files[i].equals(notToDelete)) //$NON-NLS-1$				new File(base, files[i]).delete();		}	}