Various code cleanup.

app/Http/Controllers/Chart/CategoryController.php

@@ -40,6 +40,8 @@ use FireflyIII\Support\Http\Controllers\ChartGeneration;
 use FireflyIII\Support\Http\Controllers\DateCalculation;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Support\Collection;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
 
 /**
  * Class CategoryController.
@@ -66,7 +68,6 @@ class CategoryController extends Controller
      * Show an overview for a category for all time, per month/week/year.
      * TODO test method, for category refactor.
      *
-     * @throws FireflyException
      */
     public function all(Category $category): JsonResponse
     {
@@ -256,7 +257,12 @@ class CategoryController extends Controller
      * Chart for a specific period.
      * TODO test me, for category refactor.
      *
-     * @throws FireflyException
+     * @param Category $category
+     * @param Carbon   $date
+     *
+     * @return JsonResponse
+     * @throws ContainerExceptionInterface
+     * @throws NotFoundExceptionInterface
      */
     public function specificPeriod(Category $category, Carbon $date): JsonResponse
     {