Use enums instead os switch blocks

Its better to use enums instead of switch
blocks which makes the code longer and difficult
to maintain as and when new state appears.

observer/etc/observer.urm.puml

@@ -33,7 +33,9 @@ package com.iluwatar.observer {
     + RAINY {static}
     + SUNNY {static}
     + WINDY {static}
+    + description String
     + toString() : String
+    + getDescription() : String
     + valueOf(name : String) : WeatherType {static}
     + values() : WeatherType[] {static}
   }
@@ -71,10 +73,10 @@ package com.iluwatar.observer.generic {
 Weather -->  "-currentWeather" WeatherType
 GWeather -->  "-currentWeather" WeatherType
 Weather -->  "-observers" WeatherObserver
-Hobbits ..|> WeatherObserver 
-Orcs ..|> WeatherObserver 
-GHobbits ..|> Race 
-GOrcs ..|> Race 
-GWeather --|> Observable 
-Race --|> Observer 
-@enduml
+Hobbits ..|> WeatherObserver
+Orcs ..|> WeatherObserver
+GHobbits ..|> Race
+GOrcs ..|> Race
+GWeather --|> Observable
+Race --|> Observer
+@enduml