removed BEs and replaced with DTOs
implemented creation of DTOs for JUnit-Tests
add complete Class-diagramm
added synchronized for getInstance()
added Blatt 5
added Blatt 5
added Blatt5
Merge branch 'refactoring' of https://github.com/Tim1/SW-Architektur into refactoring
revised Architekturdokumentation #38
Changes for Code Review #37
added Blatt6
renamed variable