iText mergePDF

protected void mergePDF(String srcFolder, String destFolder) throws FileNotFoundException, IOException, DocumentException {
        //merge PDF
        Document document = new Document();
        List<PdfReader> readers = new ArrayList<PdfReader>();
        int totalPages = 0;
        File folder = new File(srcFolder);
        for (File fileEntry : folder.listFiles()) {

            if (!fileEntry.isDirectory()) {
                InputStream pdf = new FileInputStream(fileEntry.getPath());

                PdfReader pdfReader = new PdfReader(pdf);
                readers.add(pdfReader);
                totalPages += pdfReader.getNumberOfPages();
            }
        }
        OutputStream outputStream = new FileOutputStream(destFolder + "out.pdf");
        PdfWriter writer = PdfWriter.getInstance(document, outputStream);
        document.open();
        BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
        PdfContentByte cb = writer.getDirectContent(); // Holds the PDF

        PdfImportedPage page;
        int currentPageNumber = 0;
        int pageOfCurrentReaderPDF = 0;
        Iterator<PdfReader> iteratorPDFReader = readers.iterator();

        while (iteratorPDFReader.hasNext()) {
             PdfReader pdfReader = iteratorPDFReader.next();

            // Create a new page in the target for each source page.
            while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
                document.newPage();
                pageOfCurrentReaderPDF++;
                currentPageNumber++;
                page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
                cb.addTemplate(page, 0, 0);
                document.add(new Paragraph("My Text here"));


            }
            pageOfCurrentReaderPDF = 0;
        }
        outputStream.flush();
        document.close();
        outputStream.close();


    }