update

Writerside/topics/OOAD/DesigningForMaintainability.md

@@ -2,4 +2,50 @@
 
 ## [UML (Unified Modeling Language)](UML.md)
 
+```mermaid
+classDiagram
+    class AdventurePackage {
+        -title: String
+        -description: String
+    }
 
+    class Trip {
+        -startingDate: Date
+    }
+    
+    class Accommodation {
+        -name: String
+        -address: String
+    }
+
+    class Person {
+        -name: String
+        -address: String
+    }
+
+    class Participant {
+    }
+
+    class TourGuide {
+    }
+
+    class Booking {
+        -bookingDate: Date
+        -isPaid: Boolean
+    }
+
+    Person <|-- Participant
+    Person <|-- TourGuide
+
+    AdventurePackage "1" --o "0..*" Trip : contains >
+    Trip "0..*" -- "1" Accommodation : has >
+    Trip "0..*" -- "1" TourGuide : leads >
+    Trip "0..*" -- "0..*" Participant : booked by >
+
+    Participant "1" --o "0..*" Booking : makes >
+    Booking "0..*" -- "1" Trip : for >
+    Booking "0..*" -- "1" Participant : by >
+
+    TourGuide "1" --o "0..*" AdventurePackage : certified for >
+
+```

Writerside/topics/OOAD/UMLSequenzDiagramme.md

@@ -76,4 +76,3 @@ Indizieren, dass ein [Teilnehmer](UMLSequenzDiagramme.md#participants) aktiv ist
 ## Möglicher Spicker
 ![image_253.png](image_253.png)
 
-

Writerside/topics/OOAD/UMLStateDiagramme.md

@@ -67,30 +67,33 @@
 - Handhaben Events innerhalb eines States
 - ![image_124.png](image_124.png)
 
-### Types of Events
-#### Call Events
+## Types of Events
+### Call Events
 - Operation calls inklusive der Parameter
   - _occupy(user, LectureHall)_
 
-#### Time Events
+### Time Events
 - Zeitbasierter Zustandsübergang (relativ / absolut)
   - _relative: after(5 sec)_
   - _absolute: when(time == 16:00)_
 
-#### Change Events
+### Change Events
 - Permanente Überwachung, ob eine Bedingung wahr wird
   - _when (registration == numberOfSeats)_
 
-#### Any Receive Events
+### Any Receive Events
 - Zur Spezifikation einen Typ eines _else_ Übergangs
 - Falls ein Event auftritt, welches keine Übergänge für den aktiven Zustand auslöst
   - _the object transitions to S4 without any event that is not e1 or e2_
 
-#### Completion Events
+### Completion Events
 - Falls alle Verhaltensweisen eines States vollständig sind
   - _once A1 is completed completion event triggers transition to S2_
 
-### State Transition Examples
+## State Transition Examples
 - ![image_125.png](image_125.png)
 - ![image_126.png](image_126.png)
-- ![image_127.png](image_127.png)
+- ![image_127.png](image_127.png)
+
+## Möglicher Spicker
+![image_270.png](image_270.png)