Add Objects.equals(Object, Object)

smack-core/src/main/java/org/jivesoftware/smack/util/Objects.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2015 Florian Schmaus
+ * Copyright 2015-2018 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,4 +28,8 @@ public class Objects {
     public static <T> T requireNonNull(T obj) {
         return requireNonNull(obj, null);
     }
+
+    public static boolean equals(Object a, Object b) {
+        return a == b || (a != null && a.equals(b));
+    }
 }