magento#21083: Static test fix.

Author: p-bystritsky

app/code/Magento/ConfigurableProduct/Model/LinkManagement.php

@@ -11,6 +11,8 @@
 
 /**
  * Configurable product link management.
+ *
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class LinkManagement implements \Magento\ConfigurableProduct\Api\LinkManagementInterface
 {
@@ -109,6 +111,10 @@ public function getChildren($sku)
 
     /**
      * @inheritdoc
+     * @throws InputException
+     * @throws NoSuchEntityException
+     * @throws StateException
+     * @throws \Magento\Framework\Exception\CouldNotSaveException
      */
     public function addChild($sku, $childSku)
     {
@@ -147,6 +153,10 @@ public function addChild($sku, $childSku)
 
     /**
      * @inheritdoc
+     * @throws InputException
+     * @throws NoSuchEntityException
+     * @throws StateException
+     * @throws \Magento\Framework\Exception\CouldNotSaveException
      */
     public function removeChild($sku, $childSku)
     {