final byte[] b = new byte[preloadSizeForCharset];
        try {
            bis.mark(preloadSizeForCharset);
            @SuppressWarnings("resource")
            final BOMInputStream bomIn = new BOMInputStream(bis, false, ByteOrderMark.UTF_8, ByteOrderMark.UTF_16BE, ByteOrderMark.UTF_16LE,
                    ByteOrderMark.UTF_32BE, ByteOrderMark.UTF_32LE, BOM_UTF_7);
            if (bomIn.hasBOM()) {