first steps
transfer commit
Refactored the PersistenceState out of the challengeRepository,
implemented ChangeTrackingService
Refactored InitializingService and ServiceContainer
asdf
removed idMap, added the id field to the challenge
removed delete method and added delete handler
challengerepository is now transformed into challengepool
fuck
refactored persistencestatesupplier
deletehandler
savevisitor
wrapped SQLExceptions in PersistenceExceptions
replaced SQLExceptions with PersistenceExceptions
replaced wordrepository with wordpool
package structure changed
removed unused code