Problem:

Adding all classes to a parent package that does not contain a class is not possible. The Parent Package is never created by the jvm etc. You have to manually add all sub packages instead.

Adding classes from a package where no Classes have been loaded from yet is not possible, jvm lazy creates the packages.
e.g. Pakcage.getPackage("my.package") does not exist until a class in "my.package" has been loaded. Workaround is to force load a class e.g. my.package.MyClass.class.getPackage()

Solution:
Add method to ClassContainer API

• addPackage(String packageName)
• addPackages(boolean recursive, String... packageNames)
• addPackages(boolean recursive, Filter<ArchivePath> filter, String... packageNames)