[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/EqualsAndHashCodeInAnonymousClass.java

@@ -0,0 +1,36 @@
+public class EqualsAndHashCodeInAnonymousClass {
+	Object annonymous = new Object() {
+
+		class Inner {
+			private String string;
+
+			@java.lang.Override
+			@java.lang.SuppressWarnings("all")
+			public boolean equals(final java.lang.Object o) {
+				if (o == this) return true;
+				if (!(o instanceof Inner)) return false;
+				final Inner other = (Inner) o;
+				if (!other.canEqual((java.lang.Object) this)) return false;
+				final java.lang.Object this$string = this.string;
+				final java.lang.Object other$string = other.string;
+				if (this$string == null ? other$string != null : !this$string.equals(other$string)) return false;
+				return true;
+			}
+
+			@java.lang.SuppressWarnings("all")
+			protected boolean canEqual(final java.lang.Object other) {
+				return other instanceof Inner;
+			}
+
+			@java.lang.Override
+			@java.lang.SuppressWarnings("all")
+			public int hashCode() {
+				final int PRIME = 59;
+				int result = 1;
+				final java.lang.Object $string = this.string;
+				result = result * PRIME + ($string == null ? 43 : $string.hashCode());
+				return result;
+			}
+		}
+	};
+}