Various code cleanup.

app/Services/Internal/Update/CategoryUpdateService.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * CategoryUpdateService.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Services\Internal\Update;
+
+use FireflyIII\Models\Category;
+
+
+/**
+ * Class CategoryUpdateService
+ */
+class CategoryUpdateService
+{
+    /**
+     * @param Category $category
+     * @param array    $data
+     *
+     * @return Category
+     */
+    public function update(Category $category, array $data): Category
+    {
+        $category->name = $data['name'];
+        $category->save();
+
+        return $category;
+    }
+
+}