} else {
            filePrefix = "none";
            extension = "";
        }
        File inputFile = null;
        File outputFile = null;
        try {
            inputFile = File.createTempFile("jodextin_" + filePrefix + "_", StringUtil.isNotBlank(extension) ? "." + extension : extension,
                    tempDir);
            final String outExt = getOutputExtension(extension);