diff --git a/src/Event/QueryStringCreated.php b/src/Event/QueryStringCreated.php
index bdcf021..471d735 100644
--- a/src/Event/QueryStringCreated.php
+++ b/src/Event/QueryStringCreated.php
@@ -12,7 +12,7 @@ use Symfony\Component\HttpFoundation\ParameterBag;
  *
  * This event allows modules to change the facet's query string if needed.
  */
-class QueryStringCreated extends Event {
+final class QueryStringCreated extends Event {
 
   const NAME = 'facets.query_string_created';
 
@@ -21,7 +21,7 @@ class QueryStringCreated extends Event {
    *
    * @var \Symfony\Component\HttpFoundation\ParameterBag
    */
-  private $getParameters;
+  private $queryParameters;
 
   /**
    * The filter parameters.
@@ -43,6 +43,7 @@ class QueryStringCreated extends Event {
    * @var array
    */
   private $activeFilters;
+
   /**
    * The facet.
    *
@@ -53,7 +54,7 @@ class QueryStringCreated extends Event {
   /**
    * QueryStringCreated constructor.
    *
-   * @param \Symfony\Component\HttpFoundation\ParameterBag $getParameters
+   * @param \Symfony\Component\HttpFoundation\ParameterBag $queryParameters
    *   The get parameters to use.
    * @param array $filterParameters
    *   The filter parameters to use.
@@ -64,13 +65,8 @@ class QueryStringCreated extends Event {
    * @param \Drupal\facets\FacetInterface $facet
    *   The facet.
    */
-  public function __construct(ParameterBag $getParameters,
-                              array $filterParameters,
-                              ResultInterface $facetResult,
-                              array $activeFilters,
-                              FacetInterface $facet
-  ) {
-    $this->getParameters = $getParameters;
+  public function __construct(ParameterBag $queryParameters, array $filterParameters, ResultInterface $facetResult, array $activeFilters, FacetInterface $facet) {
+    $this->queryParameters = $queryParameters;
     $this->filterParameters = $filterParameters;
     $this->facetResult = $facetResult;
     $this->activeFilters = $activeFilters;
@@ -83,8 +79,8 @@ class QueryStringCreated extends Event {
    * @return \Symfony\Component\HttpFoundation\ParameterBag
    *   The get parameters.
    */
-  public function getGetParameters() {
-    return $this->getParameters;
+  public function getQueryParameters() {
+    return $this->queryParameters;
   }
 
   /**
diff --git a/src/Plugin/facets/url_processor/QueryString.php b/src/Plugin/facets/url_processor/QueryString.php
index 2de1108..8e5241f 100644
--- a/src/Plugin/facets/url_processor/QueryString.php
+++ b/src/Plugin/facets/url_processor/QueryString.php
@@ -46,6 +46,9 @@ class QueryString extends UrlProcessorPluginBase {
     $this->initializeActiveFilters();
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
     return new static(
       $configuration,
diff --git a/tests/facets_events_test/src/EventListener.php b/tests/facets_events_test/src/EventListener.php
index 70c76b8..183f141 100644
--- a/tests/facets_events_test/src/EventListener.php
+++ b/tests/facets_events_test/src/EventListener.php
@@ -26,7 +26,7 @@ class EventListener implements EventSubscriberInterface {
    *   The query string created event.
    */
   public function queryStringCreated(QueryStringCreated $event) {
-    $event->getGetParameters()->add(['test' => 'fun']);
+    $event->getQueryParameters()->add(['test' => 'fun']);
   }
 
 }