setting permissions on a new document

[Allison, Timothy B.]

All,
  I'm trying to create a test doc for permission checking over on Tika,  when I 
try the most basic program:

    public static void main(String[] args) throws Exception {
        File f = new File("C:/temp/testPDF_protected.pdf");
        PDDocument document = new PDDocument();
        AccessPermission ap = new AccessPermission();
        ap.setReadOnly();
        StandardProtectionPolicy spp = new StandardProtectionPolicy("owner", 
"user", ap);
        document.protect(spp);
        document.save(f);
        document.close();
    }

AdobeReader isn't able to open the file.  I'm sure that this is user 
error...what am I doing wrong?

     Thank you.

                   Best,

                        Tim