diff --git a/app/code/Magento/Catalog/Model/Indexer/Category/Flat/AbstractAction.php b/app/code/Magento/Catalog/Model/Indexer/Category/Flat/AbstractAction.php
index e5944e91d2e4d..1506ccf6963bf 100644
--- a/app/code/Magento/Catalog/Model/Indexer/Category/Flat/AbstractAction.php
+++ b/app/code/Magento/Catalog/Model/Indexer/Category/Flat/AbstractAction.php
@@ -8,6 +8,9 @@
 
 use Magento\Framework\App\ResourceConnection;
 
+/**
+ * Abstract action class for category flat indexers.
+ */
 class AbstractAction
 {
     /**
@@ -496,6 +499,8 @@ protected function getTableName($name)
     }
 
     /**
+     * Get category metadata instance.
+     *
      * @return \Magento\Framework\EntityManager\EntityMetadata
      */
     private function getCategoryMetadata()
@@ -509,6 +514,8 @@ private function getCategoryMetadata()
     }
 
     /**
+     * Get skip static columns instance.
+     *
      * @return array
      */
     private function getSkipStaticColumns()
diff --git a/app/code/Magento/Catalog/Model/ResourceModel/Product/LinkedProductSelectBuilderByBasePrice.php b/app/code/Magento/Catalog/Model/ResourceModel/Product/LinkedProductSelectBuilderByBasePrice.php
index c961bf2bc893f..841fe17bdcf05 100644
--- a/app/code/Magento/Catalog/Model/ResourceModel/Product/LinkedProductSelectBuilderByBasePrice.php
+++ b/app/code/Magento/Catalog/Model/ResourceModel/Product/LinkedProductSelectBuilderByBasePrice.php
@@ -11,6 +11,9 @@
 use Magento\Framework\DB\Select;
 use Magento\Store\Model\Store;
 
+/**
+ * Provide Select object for retrieve product id with minimal price.
+ */
 class LinkedProductSelectBuilderByBasePrice implements LinkedProductSelectBuilderInterface
 {
     /**
@@ -69,7 +72,7 @@ public function __construct(
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function build($productId)
     {