diff --git a/Model/Accessory.php b/Model/Accessory.php
index 95f2539..9f5263a 100644
--- a/Model/Accessory.php
+++ b/Model/Accessory.php
@@ -6,7 +6,16 @@
 
 namespace MagePal\LinkProduct\Model;
 
-class Accessory extends \Magento\Framework\DataObject
+use Magento\Catalog\Model\Product;
+use Magento\Catalog\Model\ResourceModel\Product\Link\Collection;
+use Magento\Framework\DataObject;
+use MagePal\LinkProduct\Model\Product\Link;
+
+/**
+ * Class Accessory
+ * @package MagePal\LinkProduct\Model
+ */
+class Accessory extends DataObject
 {
     /**
      * Product link instance
@@ -15,8 +24,12 @@ class Accessory extends \Magento\Framework\DataObject
      */
     protected $linkInstance;
 
+    /**
+     * Accessory constructor.
+     * @param Link $productLink
+     */
     public function __construct(
-        \MagePal\LinkProduct\Model\Product\Link $productLink
+        Link $productLink
     ) {
         $this->linkInstance = $productLink;
     }
@@ -34,10 +47,10 @@ public function getLinkInstance()
     /**
      * Retrieve array of Accessory products
      *
-     * @param \Magento\Catalog\Model\Product $currentProduct
+     * @param Product $currentProduct
      * @return array
      */
-    public function getAccessoryProducts(\Magento\Catalog\Model\Product $currentProduct)
+    public function getAccessoryProducts(Product $currentProduct)
     {
         if (!$this->hasAccessoryProducts()) {
             $products = [];
@@ -53,10 +66,10 @@ public function getAccessoryProducts(\Magento\Catalog\Model\Product $currentProd
     /**
      * Retrieve accessory products identifiers
      *
-     * @param \Magento\Catalog\Model\Product $currentProduct
+     * @param Product $currentProduct
      * @return array
      */
-    public function getAccessoryProductIds(\Magento\Catalog\Model\Product $currentProduct)
+    public function getAccessoryProductIds(Product $currentProduct)
     {
         if (!$this->hasAccessoryProductIds()) {
             $ids = [];
@@ -71,10 +84,10 @@ public function getAccessoryProductIds(\Magento\Catalog\Model\Product $currentPr
     /**
      * Retrieve collection accessory product
      *
-     * @param \Magento\Catalog\Model\Product $currentProduct
+     * @param Product $currentProduct
      * @return \Magento\Catalog\Model\ResourceModel\Product\Link\Product\Collection
      */
-    public function getAccessoryProductCollection(\Magento\Catalog\Model\Product $currentProduct)
+    public function getAccessoryProductCollection(Product $currentProduct)
     {
         $collection = $this->getLinkInstance()->useAccessoryLinks()->getProductCollection()->setIsStrongMode();
         $collection->setProduct($currentProduct);
@@ -84,10 +97,10 @@ public function getAccessoryProductCollection(\Magento\Catalog\Model\Product $cu
     /**
      * Retrieve collection accessory link
      *
-     * @param \Magento\Catalog\Model\Product $currentProduct
-     * @return \Magento\Catalog\Model\ResourceModel\Product\Link\Collection
+     * @param Product $currentProduct
+     * @return Collection
      */
-    public function getAccessoryLinkCollection(\Magento\Catalog\Model\Product $currentProduct)
+    public function getAccessoryLinkCollection(Product $currentProduct)
     {
         $collection = $this->getLinkInstance()->useAccessoryLinks()->getLinkCollection();
         $collection->setProduct($currentProduct);
diff --git a/Model/Product/CopyConstructor/Accessory.php b/Model/Product/CopyConstructor/Accessory.php
index fd77d5e..97ea15c 100644
--- a/Model/Product/CopyConstructor/Accessory.php
+++ b/Model/Product/CopyConstructor/Accessory.php
@@ -6,16 +6,24 @@
 
 namespace MagePal\LinkProduct\Model\Product\CopyConstructor;
 
-class Accessory implements \Magento\Catalog\Model\Product\CopyConstructorInterface
+use Magento\Catalog\Model\Product;
+use Magento\Catalog\Model\Product\CopyConstructorInterface;
+use Magento\Catalog\Model\Product\Link;
+
+/**
+ * Class Accessory
+ * @package MagePal\LinkProduct\Model\Product\CopyConstructor
+ */
+class Accessory implements CopyConstructorInterface
 {
     /**
      * Build product links
      *
-     * @param \Magento\Catalog\Model\Product $product
-     * @param \Magento\Catalog\Model\Product $duplicate
+     * @param Product $product
+     * @param Product $duplicate
      * @return void
      */
-    public function build(\Magento\Catalog\Model\Product $product, \Magento\Catalog\Model\Product $duplicate)
+    public function build(Product $product, Product $duplicate)
     {
         $data = [];
         $attributes = [];
@@ -27,10 +35,11 @@ public function build(\Magento\Catalog\Model\Product $product, \Magento\Catalog\
                 $attributes[] = $attribute['code'];
             }
         }
-        /** @var \Magento\Catalog\Model\Product\Link $link  */
+        /** @var Link $link  */
         foreach ($product->getAccessoryLinkCollection() as $link) {
             $data[$link->getLinkedProductId()] = $link->toArray($attributes);
         }
+
         $duplicate->setAccessoryLinkData($data);
     }
 }
diff --git a/Model/Product/Link.php b/Model/Product/Link.php
index 679561b..f5786fe 100644
--- a/Model/Product/Link.php
+++ b/Model/Product/Link.php
@@ -6,6 +6,10 @@
 
 namespace MagePal\LinkProduct\Model\Product;
 
+/**
+ * Class Link
+ * @package MagePal\LinkProduct\Model\Product
+ */
 class Link extends \Magento\Catalog\Model\Product\Link
 {
     const LINK_TYPE_ACCESSORY = 7;
diff --git a/Model/ProductLink/CollectionProvider/Accessory.php b/Model/ProductLink/CollectionProvider/Accessory.php
index 6f99fe2..5a44112 100644
--- a/Model/ProductLink/CollectionProvider/Accessory.php
+++ b/Model/ProductLink/CollectionProvider/Accessory.php
@@ -6,11 +6,22 @@
 
 namespace MagePal\LinkProduct\Model\ProductLink\CollectionProvider;
 
-class Accessory implements \Magento\Catalog\Model\ProductLink\CollectionProviderInterface
+use Magento\Catalog\Model\Product;
+use Magento\Catalog\Model\ProductLink\CollectionProviderInterface;
+
+/**
+ * Class Accessory
+ * @package MagePal\LinkProduct\Model\ProductLink\CollectionProvider
+ */
+class Accessory implements CollectionProviderInterface
 {
     /** @var \MagePal\LinkProduct\Model\Accessory */
     protected $accessoryModel;
 
+    /**
+     * Accessory constructor.
+     * @param \MagePal\LinkProduct\Model\Accessory $accessoryModel
+     */
     public function __construct(
         \MagePal\LinkProduct\Model\Accessory $accessoryModel
     ) {
@@ -20,7 +31,7 @@ public function __construct(
     /**
      * {@inheritdoc}
      */
-    public function getLinkedProducts(\Magento\Catalog\Model\Product $product)
+    public function getLinkedProducts(Product $product)
     {
         return (array) $this->accessoryModel->getAccessoryProducts($product);
     }
diff --git a/Plugin/CatalogImportExport/Model/Import/Product.php b/Plugin/CatalogImportExport/Model/Import/Product.php
index 0fa4ffc..43a6a33 100644
--- a/Plugin/CatalogImportExport/Model/Import/Product.php
+++ b/Plugin/CatalogImportExport/Model/Import/Product.php
@@ -2,22 +2,25 @@
 
 namespace MagePal\LinkProduct\Plugin\CatalogImportExport\Model\Import;
 
+use Magento\CatalogImportExport\Model\Import\Produc;
+use MagePal\LinkProduct\Model\Product\Link;
+
 /**
  * @see \Magento\CatalogImportExport\Model\Import\Product::getLinkNameToId
  */
 class Product
 {
     /**
-     * REMARK: needs core patch https://github.com/magento/magento2/pull/21230/commits/0846e9aed7040659e7ce3e109eb91df3f5fdfb7e.patch
+     * REMARK: needs core patch
+     * https://github.com/magento/magento2/pull/21230/commits/0846e9aed7040659e7ce3e109eb91df3f5fdfb7e.patch
      *
-     * @param \Magento\CatalogImportExport\Model\Import\Produc $subject
+     * @param \Magento\CatalogImportExport\Model\Import\Product $subject
      * @param $result
-     *
      * @return mixed
      */
     public function afterGetLinkNameToId(\Magento\CatalogImportExport\Model\Import\Product $subject, $result)
     {
-        $result['_accessory_'] = \MagePal\LinkProduct\Model\Product\Link::LINK_TYPE_ACCESSORY;
+        $result['_accessory_'] = Link::LINK_TYPE_ACCESSORY;
         return $result;
     }
     
diff --git a/Setup/InstallSchema.php b/Setup/InstallSchema.php
index eb9bce9..2210b24 100644
--- a/Setup/InstallSchema.php
+++ b/Setup/InstallSchema.php
@@ -9,7 +9,13 @@
 use Magento\Framework\Setup\InstallSchemaInterface;
 use Magento\Framework\Setup\ModuleContextInterface;
 use Magento\Framework\Setup\SchemaSetupInterface;
+use MagePal\LinkProduct\Model\Product\Link;
+use MagePal\LinkProduct\Ui\DataProvider\Product\Form\Modifier\Accessory;
 
+/**
+ * Class InstallSchema
+ * @package MagePal\LinkProduct\Setup
+ */
 class InstallSchema implements InstallSchemaInterface
 {
 
@@ -25,8 +31,8 @@ public function install(SchemaSetupInterface $setup, ModuleContextInterface $con
          * Install product link types in table (catalog_product_link_type)
          */
         $catalogProductLinkTypeData = [
-            'link_type_id' => \MagePal\LinkProduct\Model\Product\Link::LINK_TYPE_ACCESSORY,
-            'code' => \MagePal\LinkProduct\Ui\DataProvider\Product\Form\Modifier\Accessory::DATA_SCOPE_ACCESSORY
+            'link_type_id' => Link::LINK_TYPE_ACCESSORY,
+            'code' => Accessory::DATA_SCOPE_ACCESSORY
         ];
 
         $setup->getConnection()->insertOnDuplicate(
@@ -38,7 +44,7 @@ public function install(SchemaSetupInterface $setup, ModuleContextInterface $con
          * install product link attributes position in table catalog_product_link_attribute
          */
         $catalogProductLinkAttributeData = [
-            'link_type_id' => \MagePal\LinkProduct\Model\Product\Link::LINK_TYPE_ACCESSORY,
+            'link_type_id' => Link::LINK_TYPE_ACCESSORY,
             'product_link_attribute_code' => 'position',
             'data_type' => 'int',
         ];
diff --git a/Ui/DataProvider/Product/Form/Modifier/Accessory.php b/Ui/DataProvider/Product/Form/Modifier/Accessory.php
index cd7b5fa..22bbec0 100644
--- a/Ui/DataProvider/Product/Form/Modifier/Accessory.php
+++ b/Ui/DataProvider/Product/Form/Modifier/Accessory.php
@@ -6,9 +6,14 @@
 
 namespace MagePal\LinkProduct\Ui\DataProvider\Product\Form\Modifier;
 
+use Magento\Catalog\Ui\DataProvider\Product\Form\Modifier\Related;
 use Magento\Ui\Component\Form\Fieldset;
 
-class Accessory extends \Magento\Catalog\Ui\DataProvider\Product\Form\Modifier\Related
+/**
+ * Class Accessory
+ * @package MagePal\LinkProduct\Ui\DataProvider\Product\Form\Modifier
+ */
+class Accessory extends Related
 {
     const DATA_SCOPE_ACCESSORY = 'accessory';
     /**
@@ -39,10 +44,10 @@ public function modifyMeta(array $meta)
                                 'componentType' => Fieldset::NAME,
                                 'dataScope' => static::DATA_SCOPE,
                                 'sortOrder' => $this->getNextGroupSortOrder(
-                                        $meta,
-                                        self::$previousGroup,
-                                        self::$sortOrder
-                                    ),
+                                    $meta,
+                                    self::$previousGroup,
+                                    self::$sortOrder
+                                ),
                             ],
                         ],
                     ],
diff --git a/Ui/DataProvider/Product/Related/AccessoryDataProvider.php b/Ui/DataProvider/Product/Related/AccessoryDataProvider.php
index 00117dc..93c9028 100644
--- a/Ui/DataProvider/Product/Related/AccessoryDataProvider.php
+++ b/Ui/DataProvider/Product/Related/AccessoryDataProvider.php
@@ -8,6 +8,10 @@
 
 use Magento\Catalog\Ui\DataProvider\Product\Related\AbstractDataProvider;
 
+/**
+ * Class AccessoryDataProvider
+ * @package MagePal\LinkProduct\Ui\DataProvider\Product\Related
+ */
 class AccessoryDataProvider extends AbstractDataProvider
 {
     /**
diff --git a/composer.json b/composer.json
index 2fe74d5..cb250f6 100644
--- a/composer.json
+++ b/composer.json
@@ -20,11 +20,11 @@
     ],
     "require": {
         "php": "~5.6.0|7.0.2|7.0.4|~7.0.6|~7.1.0|~7.1.3|~7.2.0",
-        "magento/module-backend": "100.0.*|100.1.*|100.2.*|101.0.0",
+        "magento/module-backend": "100.0.*|100.1.*|100.2.*|101.0.*",
         "magento/framework": "100.0.*|100.1.*|101.0.*|102.0.*"
     },
     "type": "magento2-module",
-    "version": "1.1.1",
+    "version": "1.1.2",
     "autoload": {
         "files": [
             "registration.php"