Some code cleanup courtesy of PHPStorm.

app/Repositories/Category/SingleCategoryRepository.php

@@ -25,7 +25,7 @@ class SingleCategoryRepository extends ComponentRepository implements SingleCate
      */
     public function countJournals(Category $category)
     {
-        return $category->transactionJournals()->count();
+        return $category->transactionjournals()->count();
 
     }
 
@@ -39,7 +39,7 @@ class SingleCategoryRepository extends ComponentRepository implements SingleCate
      */
     public function countJournalsInRange(Category $category, Carbon $start, Carbon $end)
     {
-        return $category->transactionJournals()->before($end)->after($start)->count();
+        return $category->transactionjournals()->before($end)->after($start)->count();
     }
 
     /**

app/Repositories/RuleGroup/RuleGroupRepository.php

@@ -8,6 +8,11 @@ use FireflyIII\Models\Rule;
 use FireflyIII\Models\RuleGroup;
 use Illuminate\Support\Collection;
 
+/**
+ * Class RuleGroupRepository
+ *
+ * @package FireflyIII\Repositories\RuleGroup
+ */
 class RuleGroupRepository implements RuleGroupRepositoryInterface
 {
     /**

app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php

@@ -52,6 +52,8 @@ interface RuleGroupRepositoryInterface
     public function resetRuleGroupOrder();
 
     /**
+     * @param RuleGroup $ruleGroup
+     *
      * @return bool
      */
     public function resetRulesInGroupOrder(RuleGroup $ruleGroup);

app/Repositories/Shared/ComponentRepository.php

@@ -35,7 +35,7 @@ class ComponentRepository
                          ->leftJoin('accounts', 'accounts.id', '=', 'transactions.account_id')
                          ->whereIn('accounts.id', $ids)
                          ->after($start)
-                         ->first([DB::Raw('SUM(`transactions`.`amount`) as `journalAmount`')]);
+                         ->first([DB::raw('SUM(`transactions`.`amount`) as `journalAmount`')]);
         $amount = $entry->journalAmount;
 
         return $amount;