Added example of generic observer

observer/src/main/java/com/iluwatar/generic/GHobbits.java

@@ -0,0 +1,25 @@
+package com.iluwatar.generic;
+
+import com.iluwatar.WeatherType;
+
+public class GHobbits implements Race {
+    @Override
+    public void update(GWeather o, WeatherType weatherType) {
+        switch (weatherType) {
+            case COLD:
+                System.out.println("The hobbits are shivering in the cold weather.");
+                break;
+            case RAINY:
+                System.out.println("The hobbits look for cover from the rain.");
+                break;
+            case SUNNY:
+                System.out.println("The happy hobbits bade in the warm sun.");
+                break;
+            case WINDY:
+                System.out.println("The hobbits hold their hats tightly in the windy weather.");
+                break;
+            default:
+                break;
+        }
+    }
+}