final String encoding = xmlExtractor.getEncoding(bis);
        CloseableUtil.closeQuietly(bis);
        assertEquals("Shift_JIS", encoding);
    }

    public void test_getEncoding_utf8bom() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/xml/test_utf8bom.xml");
        final BufferedInputStream bis = new BufferedInputStream(in);