Added isInitialized() and missing JavaDoc

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformManager.java

@@ -321,10 +321,24 @@ public class PlatformManager {
         return queryCapability(Capability.CONFIGURATION).getConfiguration();
     }
 
+    /**
+     * Get the current supported {@link SideEffect}s.
+     *
+     * @return the supported side effects
+     * @throws NoCapablePlatformException thrown if no platform is capable
+     */
     public Collection<SideEffect> getSupportedSideEffects() {
         return queryCapability(Capability.WORLD_EDITING).getSupportedSideEffects();
     }
 
+    /**
+     * Get the initialized state of the Platform.
+     * {@return if the platform manager is initialized}
+     */
+    public boolean isInitialized() {
+        return initialized.get();
+    }
+
     /**
      * You shouldn't have been calling this anyways, but this is now deprecated. Either don't
      * fire this event at all, or fire the new event via the event bus if you're a platform.