Code cleanup.

app/Models/TransactionGroup.php

@@ -3,20 +3,34 @@
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
+/**
+ * Class TransactionGroup
+ *
+ * @package FireflyIII\Models
+ */
 class TransactionGroup extends Model
 {
     use SoftDeletes;
 
+    /**
+     * @return array
+     */
     public function getDates()
     {
         return ['created_at', 'updated_at', 'deleted_at'];
     }
 
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     */
     public function transactionjournals()
     {
         return $this->belongsToMany('FireflyIII\Models\TransactionJournal');
     }
 
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function user()
     {
         return $this->belongsTo('FireflyIII\User');