add checks for some events to see if the feature is enabled and more cleanup

src/main/java/cc/fascinated/bat/service/FeatureService.java

@@ -70,6 +70,17 @@ public class FeatureService {
         return features.get(name.toLowerCase());
     }
 
+    /**
+     * Gets a feature by class
+     *
+     * @param clazz The class of the feature
+     * @return The feature
+     */
+    public <T extends Feature> T getFeature(Class<T> clazz) {
+        Feature feature = features.values().stream().filter(featureClazz -> featureClazz.getClass().equals(clazz)).findFirst().orElse(null);
+        return clazz.cast(feature);
+    }
+
     /**
      * Checks if a feature is registered
      *