Merge HTML in Java

Presentation presentation = new Presentation();
try {
    presentation.getSlides().removeAt(0);

    FileInputStream firstHtmlStream = new FileInputStream("file1.html");
    try {
        presentation.getSlides().addFromHtml(firstHtmlStream);
    } finally {
        firstHtmlStream.close();
    }

    FileInputStream secondHtmlStream = new FileInputStream("file2.html");
    try {
        presentation.getSlides().addFromHtml(secondHtmlStream);
    } finally {
        secondHtmlStream.close();
    }

    presentation.save("merged.html", SaveFormat.Html);
} finally {
    presentation.dispose();
}