[fixes #2682] Fix NPE, always add Javadoc return statement

test/transform/resource/after-delombok/BuilderWithNonNullWithSetterPrefix.java

@@ -15,6 +15,9 @@ class BuilderWithNonNullWithSetterPrefix {
 		@java.lang.SuppressWarnings("all")
 		BuilderWithNonNullWithSetterPrefixBuilder() {
 		}
+		/**
+		 * @return {@code this}.
+		 */
 		@java.lang.SuppressWarnings("all")
 		public BuilderWithNonNullWithSetterPrefix.BuilderWithNonNullWithSetterPrefixBuilder withId(@lombok.NonNull final String id) {
 			if (id == null) {