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

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

@@ -16,12 +16,18 @@ final class ConstructorsWithBuilderDefaults {
 		@java.lang.SuppressWarnings("all")
 		ConstructorsWithBuilderDefaultsBuilder() {
 		}
+		/**
+		 * @return {@code this}.
+		 */
 		@java.lang.SuppressWarnings("all")
 		public ConstructorsWithBuilderDefaults.ConstructorsWithBuilderDefaultsBuilder x(final int x) {
 			this.x$value = x;
 			x$set = true;
 			return this;
 		}
+		/**
+		 * @return {@code this}.
+		 */
 		@java.lang.SuppressWarnings("all")
 		public ConstructorsWithBuilderDefaults.ConstructorsWithBuilderDefaultsBuilder y(final int y) {
 			this.y = y;