public DebugProvider() {
    // initialize dummies
    final Vendor vendor1 = new Vendor("org.vendor1", this, new IModule[]{
        new Module("foo-lib", "org.vendor1", this, new IModuleVersion[]{
            new ModuleVersion("org.vendor1",  "foo-lib", "0.9", true, (String) null, null, null),
            new ModuleVersion("org.vendor1",  "foo-lib", "1.0", true, (String) null, null, null),
            new ModuleVersion("org.vendor1",  "foo-lib", "1.1-SNAPSHOT", false, (String) null, null, null)
        }, "1.0", "1.1-SNAPSHOT")
    });
    final Vendor vendor2 = new Vendor("com.vendor2", this, new IModule[]{});
    this.dummyModules.put(vendor1.getName(), vendor1);
    this.dummyModules.put(vendor2.getName(), vendor2);