[fixes #2838] Handle anonymous classes properly

Generated qualified names (e.g. Outer.Inner) now stop at anonymous
classes instead of adding an empty part. All handlers that add static
fields/methods/types now add error messages instead of generating
invalid code.

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

@@ -0,0 +1,33 @@
+import lombok.NonNull;
+
+public class ConstructorsInAnonymousClass {
+	Object annonymous = new Object() {
+
+		class Inner {
+			private String string;
+			@NonNull
+			private String string2;
+
+			@java.lang.SuppressWarnings("all")
+			public Inner(final String string, @NonNull final String string2) {
+				if (string2 == null) {
+					throw new java.lang.NullPointerException("string2 is marked non-null but is null");
+				}
+				this.string = string;
+				this.string2 = string2;
+			}
+
+			@java.lang.SuppressWarnings("all")
+			public Inner(@NonNull final String string2) {
+				if (string2 == null) {
+					throw new java.lang.NullPointerException("string2 is marked non-null but is null");
+				}
+				this.string2 = string2;
+			}
+
+			@java.lang.SuppressWarnings("all")
+			public Inner() {
+			}
+		}
+	};
+}