throw if method is called

Author: hub-cap

client/rest-high-level/src/main/java/org/elasticsearch/client/Validatable.java

@@ -24,7 +24,9 @@
 public interface Validatable {
     ValidationException EMPTY_VALIDATION = new ValidationException() {
         @Override
-        public void addValidationError(String error) { }
+        public void addValidationError(String error) {
+            throw new UnsupportedOperationException("Validation messages should not be added to the empty validation");
+        }
     };
 
     /**