diff --git a/README.md b/README.md
index 58063ea..4f502ff 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,11 @@
 
 Entity Print allows you to print any Drupal entity or view to PDF.
 
-For a full description visit project page: https://www.drupal.org/project/entity_print
+For a full description visit project page: 
+https://www.drupal.org/project/entity_print
 
-Bug reports, feature suggestions and latest developments: http://drupal.org/project/issues/entity_print
+Bug reports, feature suggestions and latest developments: 
+http://drupal.org/project/issues/entity_print
 
 # REQUIREMENTS
 
@@ -12,4 +14,5 @@ Bug reports, feature suggestions and latest developments: http://drupal.org/proj
 
 # INSTALLATION
 
-See documentation at https://www.drupal.org/project/entity_print and https://www.drupal.org/node/2706755
+See documentation at https://www.drupal.org/project/entity_print and 
+https://www.drupal.org/node/2706755
diff --git a/entity_print.install b/entity_print.install
index f46ccc7..e2f5f54 100644
--- a/entity_print.install
+++ b/entity_print.install
@@ -18,12 +18,12 @@ function entity_print_install() {
   // Add a PDF view mode if the node entity type exists and the PDF view mode
   // does not already exist.
   if ($entity_type_manager->getDefinition('node', FALSE) && !$storage->load('node.pdf')) {
-    $storage->create(array(
+    $storage->create([
       'targetEntityType' => 'node',
       'id' => 'node.pdf',
       'status' => TRUE,
       'label' => t('PDF'),
-    ))->save();
+    ])->save();
   }
 }
 
diff --git a/entity_print.module b/entity_print.module
index 4230820..f57ceca 100644
--- a/entity_print.module
+++ b/entity_print.module
@@ -16,7 +16,7 @@ use Drupal\entity_print\Renderer\ContentEntityRenderer;
  * Implements hook_theme().
  */
 function entity_print_theme($existing, $type, $theme, $path) {
-  return array(
+  return [
     'entity_print' => [
       'path' => $path . '/templates',
       'template' => 'entity-print',
@@ -26,7 +26,7 @@ function entity_print_theme($existing, $type, $theme, $path) {
         'entity_print_css' => NULL,
       ],
     ],
-  );
+  ];
 }
 
 /**
diff --git a/modules/entity_print_views/tests/modules/entity_print_views_test_views/config/install/views.view.my_test_view.yml b/modules/entity_print_views/tests/modules/entity_print_views_test_views/config/install/views.view.my_test_view.yml
index 710b3cc..d34f708 100644
--- a/modules/entity_print_views/tests/modules/entity_print_views_test_views/config/install/views.view.my_test_view.yml
+++ b/modules/entity_print_views/tests/modules/entity_print_views_test_views/config/install/views.view.my_test_view.yml
@@ -894,4 +894,3 @@ display:
         - 'user.node_grants:view'
         - user.permissions
       tags: {  }
-
diff --git a/src/EntityPrintPermissions.php b/src/EntityPrintPermissions.php
index 25c6a38..b5c11cf 100644
--- a/src/EntityPrintPermissions.php
+++ b/src/EntityPrintPermissions.php
@@ -34,7 +34,7 @@ class EntityPrintPermissions implements ContainerInjectionInterface {
    * Constructs a new EntityPrintPermissions.
    *
    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
-   *    The entity manager.
+   *   The entity manager.
    * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
    *   The entity type bundle info.
    * @param \Drupal\Core\StringTranslation\TranslationManager $translation_manager
diff --git a/src/Form/SettingsForm.php b/src/Form/SettingsForm.php
index 90243fa..49e5406 100644
--- a/src/Form/SettingsForm.php
+++ b/src/Form/SettingsForm.php
@@ -6,7 +6,7 @@ use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Form\ConfigFormBase;
 use Drupal\entity_print\Plugin\EntityPrintPluginManagerInterface;
-use Drupal\entity_print\Plugin\ExportTypeManager;
+use Drupal\entity_print\Plugin\ExportTypeManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Drupal\Core\Form\FormStateInterface;
@@ -33,7 +33,7 @@ class SettingsForm extends ConfigFormBase {
   /**
    * The export type manager.
    *
-   * @var \Drupal\entity_print\Plugin\ExportTypeManager
+   * @var \Drupal\entity_print\Plugin\ExportTypeManagerInterface
    */
   protected $exportTypeManager;
 
@@ -44,10 +44,12 @@ class SettingsForm extends ConfigFormBase {
    *   The factory for configuration objects.
    * @param \Drupal\entity_print\Plugin\EntityPrintPluginManagerInterface $plugin_manager
    *   The plugin manager object.
+   * @param \Drupal\entity_print\Plugin\ExportTypeManagerInterface $export_type_manager
+   *   The export type manager interface.
    * @param \Drupal\Core\Entity\EntityStorageInterface $entity_storage
    *   The config storage.
    */
-  public function __construct(ConfigFactoryInterface $config_factory, EntityPrintPluginManagerInterface $plugin_manager, ExportTypeManager $export_type_manager, EntityStorageInterface $entity_storage) {
+  public function __construct(ConfigFactoryInterface $config_factory, EntityPrintPluginManagerInterface $plugin_manager, ExportTypeManagerInterface $export_type_manager, EntityStorageInterface $entity_storage) {
     parent::__construct($config_factory);
     $this->pluginManager = $plugin_manager;
     $this->exportTypeManager = $export_type_manager;
diff --git a/src/Plugin/EntityPrint/PrintEngine/PdfEngineBase.php b/src/Plugin/EntityPrint/PrintEngine/PdfEngineBase.php
index aa3611c..0d2c107 100644
--- a/src/Plugin/EntityPrint/PrintEngine/PdfEngineBase.php
+++ b/src/Plugin/EntityPrint/PrintEngine/PdfEngineBase.php
@@ -59,7 +59,7 @@ abstract class PdfEngineBase extends PrintEngineBase {
    * @return array
    *   An array of paper sizes keyed by their machine name.
    */
-  protected abstract function getPaperSizes();
+  abstract protected function getPaperSizes();
 
   /**
    * {@inheritdoc}
diff --git a/src/PrintBuilder.php b/src/PrintBuilder.php
index 973e58a..7da7a04 100644
--- a/src/PrintBuilder.php
+++ b/src/PrintBuilder.php
@@ -39,6 +39,8 @@ class PrintBuilder implements PrintBuilderInterface {
    *   The Renderer factory.
    * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
    *   The event dispatcher.
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+   *   The string translation service.
    */
   public function __construct(RendererFactoryInterface $renderer_factory, EventDispatcherInterface $event_dispatcher, TranslationInterface $string_translation) {
     $this->rendererFactory = $renderer_factory;
diff --git a/src/Tests/EntityPrintActionTest.php b/src/Tests/EntityPrintActionTest.php
index 8f6da92..c1bdf52 100644
--- a/src/Tests/EntityPrintActionTest.php
+++ b/src/Tests/EntityPrintActionTest.php
@@ -24,10 +24,10 @@ class EntityPrintActionTest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
     // Create a content type and a dummy node.
-    $this->drupalCreateContentType(array(
+    $this->drupalCreateContentType([
       'type' => 'page',
       'name' => 'Page',
-    ));
+    ]);
     $this->node = $this->drupalCreateNode();
 
     $account = $this->drupalCreateUser([
diff --git a/tests/src/Kernel/EntityPrintAccessTest.php b/tests/src/Kernel/EntityPrintAccessTest.php
index 27193ac..6cc1fa1 100644
--- a/tests/src/Kernel/EntityPrintAccessTest.php
+++ b/tests/src/Kernel/EntityPrintAccessTest.php
@@ -126,7 +126,7 @@ class EntityPrintAccessTest extends KernelTestBase {
    */
   public function testSecondaryEntityTypeAccess() {
     // User with print entity type user permissions and entity view.
-    $account = $this->createUser(array('entity print access type user', 'access content'));
+    $account = $this->createUser(['entity print access type user', 'access content']);
     $this->assertTrue($this->checkAccess($account, 'user', $account->id()), 'User with "type user" permission and access content permission is allowed to see the content.');
   }