Add Metadata to OpenOffice with Java

[federballFridolin]

Hey ,
I've written an OO Extension and I read out the metadata with Apache Tika. But now I want to edit or add sth in the metadata, which isn't possible with Apache Tika (or I don't know how). Does sb know another library or method how to do that?
This is how i read out the metadata:

Parser parser = new AutoDetectParser();
        BodyContentHandler handler = new BodyContentHandler();
        Metadata metadata = new Metadata();
        try
        {
            FileInputStream inputstream = new FileInputStream(replaceBackslashWithSlash(xDocEL.getURL()));
            ParseContext context = new ParseContext();
            parser.parse(inputstream, handler, metadata, context);
        } catch (Exception ex) {
            System.out.println(ex);
        }

regards