diff --git a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Condition.php b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Condition.php
index 74d7cc6..ee507e3 100644
--- a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Condition.php
+++ b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Condition.php
@@ -33,7 +33,11 @@ public function compile($conditionContainer) {
       $sqlQuery = $conditionContainer->sqlQuery;
     }
 
+    // Iterate over all conditions and act based on whether they are a condition
+    // group or a single condition.
     foreach ($this->conditions as $condition) {
+      // If it's a condition group, compile the condition group and add it to
+      // the sql.
       if ($condition['field'] instanceOf ConditionInterface) {
         $sqlCondition = new SqlCondition($condition['field']->getConjunction());
         // Add the SQL query to the object before calling this method again.
@@ -41,6 +45,7 @@ public function compile($conditionContainer) {
         $condition['field']->compile($sqlCondition);
         $sqlQuery->condition($sqlCondition);
       }
+      // If it's a simple condition apply the query logic.
       else {
         $and = strtoupper($this->conjunction) == 'AND';
         $or = !$and;
@@ -80,7 +85,16 @@ public function notExists($field, $langcode = NULL) {
     return $this->condition($field, NULL, 'IS NULL', $langcode);
   }
 
-  protected function translateCondition(&$condition) {
+  /**
+   * Translates a condition array to it's sql equivalents.
+   *
+   * @param array $condition
+   *   An associative array containing the follow keys:
+   *     - field: The entity property to filter on.
+   *     - operator: The operator used in the condition, for example "=".
+   *     - value: The actual value to filter by.
+   */
+  protected function translateCondition(array &$condition) {
     if (strpos($condition['field'], '*') === FALSE) {
       $condition['field_operator'] = '=';
     }
diff --git a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Denormalize.php b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Denormalize.php
index d28c825..b2100d5 100644
--- a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Denormalize.php
+++ b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Denormalize.php
@@ -35,11 +35,15 @@ class Denormalize implements EventSubscriberInterface {
   protected $entityID;
 
   /**
-   * @var \Drupal\config\Config
+   * The config object to react on.
+   *
+   * @var \Drupal\Core\Config\Config
    */
   protected $config;
 
   /**
+   * A database insert object to put the config values into the table.
+   *
    * @var \Drupal\Core\Database\Query\Insert
    */
   public $insert;
@@ -51,7 +55,7 @@ public function __construct(Connection $connection) {
   /**
    * Reacts on the config.save event to denormalize the entity values.
    *
-   * @param \Drupal\config\ConfigEvent $event
+   * @param \Drupal\Core\Config\ConfigEvent $event
    *   The config event object containing the config object being written.
    */
   public function configSave(ConfigEvent $event) {
@@ -68,7 +72,7 @@ public function configSave(ConfigEvent $event) {
   /**
    * Reacts on the config.delete event to remove the entity values.
    *
-   * @param \Drupal\config\ConfigEvent $event
+   * @param \Drupal\Core\Config\ConfigEvent $event
    *   The config event object containing the config object being written.
    */
   public function configDelete(ConfigEvent $event) {
diff --git a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Query.php b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Query.php
index 132bb31..8cea0b1 100644
--- a/core/modules/entity/lib/Drupal/entity/ConfigQuery/Query.php
+++ b/core/modules/entity/lib/Drupal/entity/ConfigQuery/Query.php
@@ -21,6 +21,8 @@ class Query extends QueryBase {
   protected $connection;
 
   /**
+   * Constructs a Query object.
+   *
    * @param string $entity_type
    *   The entity type.
    * @param string $conjunction
diff --git a/core/modules/entity/lib/Drupal/entity/EntityBundle.php b/core/modules/entity/lib/Drupal/entity/EntityBundle.php
index 41df745..303055f 100644
--- a/core/modules/entity/lib/Drupal/entity/EntityBundle.php
+++ b/core/modules/entity/lib/Drupal/entity/EntityBundle.php
@@ -15,6 +15,7 @@
  * Bundle class for entity services.
  */
 class EntityBundle extends Bundle {
+
   /**
    * Implements \Symfony\Component\HttpKernel\Bundle\BundleInterface::build().
    */
@@ -25,4 +26,5 @@ public function build(ContainerBuilder $container) {
       ->addArgument(new Reference('database'))
       ->addTag('event_subscriber');
   }
+
 }