protected void generateClassFiles(ClassDoc[] arr, ClassTree classtree) {
        Arrays.sort(arr);
        for(int i = 0; i < arr.length; i++) {
            if (!(configuration.isGeneratedDoc(arr[i]) && arr[i].isIncluded())) {
                continue;
            }
            ClassDoc prev = (i == 0)?
                null:
                arr[i-1];
            ClassDoc curr = arr[i];
            ClassDoc next = (i+1 == arr.length)?
                null:
                arr[i+1];
            try {
                if (curr.isAnnotationType()) {
                    AbstractBuilder annotationTypeBuilder =
                        configuration.getBuilderFactory()
                            .getAnnotationTypeBuilder((AnnotationTypeDoc) curr,
                                prev, next);
                    annotationTypeBuilder.build();
                } else {
                    AbstractBuilder classBuilder =
                        configuration.getBuilderFactory()
                            .getClassBuilder(curr, prev, next, classtree);
                    classBuilder.build();
                }
            } catch (Exception e) {
                e.printStackTrace();
                throw new DocletAbortException();
            }
        }
    }