PackageProcessor packageProcessor = new ExtensiblePackageProcessor(packageProcessors, describer);
registry.addExtensionPoint(packageProcessors);
// Register base package processors
packageProcessors.addPackageProcessor(new JarContributionProcessor());
packageProcessors.addPackageProcessor(new FolderContributionProcessor());
// Create a contribution repository
ContributionRepository repository;
try {
repository = new ContributionRepositoryImpl("target");