code review

...rtiss/tooling/kernel/extension/IConnectionCompositor.java

.../fortiss/tooling/kernel/extension/IElementCompositor.java

...iss/tooling/kernel/extension/ITransformationProvider.java

...ooling/kernel/extension/base/ConstraintViolationBase.java

...kernel/extension/base/TransformationContextChainBase.java

...rtiss/tooling/kernel/extension/data/ITopLevelElement.java

...nel/extension/data/ModelElementTransformationContext.java

.../org/fortiss/tooling/kernel/extension/data/Prototype.java

.../fortiss/tooling/kernel/internal/CommandStackService.java

.../tooling/kernel/internal/ConnectionCompositorService.java

...iss/tooling/kernel/internal/ElementCompositorService.java

...g/fortiss/tooling/kernel/internal/PersistencyService.java

...ortiss/tooling/kernel/internal/TransformationService.java

...nel/internal/storage/eclipse/EMFTransactionalCommand.java

...tooling/kernel/internal/storage/eclipse/ModelContext.java

...tiss/tooling/kernel/internal/storage/eclipse/package.html

.../tooling/kernel/service/IConnectionCompositorService.java

...iss/tooling/kernel/service/IElementCompositorService.java

...ortiss/tooling/kernel/service/ITransformationService.java

...tooling/kernel/service/base/EObjectAware2ServiceBase.java