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

test/transform/resource/after-ecj/WithOnClass.java

@@ -4,6 +4,9 @@
   WithOnClass1(boolean isNone, boolean isPublic) {
     super();
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   public @java.lang.SuppressWarnings("all") WithOnClass1 withPublic(final boolean isPublic) {
     return ((this.isPublic == isPublic) ? this : new WithOnClass1(this.isNone, isPublic));
   }
@@ -15,9 +18,15 @@
   WithOnClass2(boolean isNone, boolean isProtected, boolean isPackage) {
     super();
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   @java.lang.SuppressWarnings("all") WithOnClass2 withPackage(final boolean isPackage) {
     return ((this.isPackage == isPackage) ? this : new WithOnClass2(this.isNone, this.isProtected, isPackage));
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   protected @java.lang.SuppressWarnings("all") WithOnClass2 withProtected(final boolean isProtected) {
     return ((this.isProtected == isProtected) ? this : new WithOnClass2(this.isNone, isProtected, this.isPackage));
   }
@@ -28,9 +37,15 @@
   WithOnClass3(String couldBeNull, String nonNull) {
     super();
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   public @java.lang.SuppressWarnings("all") WithOnClass3 withCouldBeNull(final String couldBeNull) {
     return ((this.couldBeNull == couldBeNull) ? this : new WithOnClass3(couldBeNull, this.nonNull));
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   public @java.lang.SuppressWarnings("all") WithOnClass3 withNonNull(final @lombok.NonNull String nonNull) {
     if ((nonNull == null))
         {
@@ -46,6 +61,9 @@
     super();
     this.fY = y;
   }
+  /**
+   * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+   */
   public @java.lang.SuppressWarnings("all") WithOnClass4 withY(final int fY) {
     return ((this.fY == fY) ? this : new WithOnClass4(fY));
   }