diff -u b/core/modules/views/src/Plugin/views/join/FieldOrLanguageJoin.php b/core/modules/views/src/Plugin/views/join/FieldOrLanguageJoin.php
--- b/core/modules/views/src/Plugin/views/join/FieldOrLanguageJoin.php
+++ b/core/modules/views/src/Plugin/views/join/FieldOrLanguageJoin.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\views\Plugin\views\join\FieldOrLanguageJoin.
- */
-
 namespace Drupal\views\Plugin\views\join;
 
 use Drupal\Core\Database\Query\SelectInterface;
diff -u b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
--- b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
+++ b/core/modules/views/src/Plugin/views/join/JoinPluginBase.php
@@ -285,15 +285,15 @@
   /**
    * Adds the extras to the join condition.
    *
-   * @param $arguments
+   * @param array $arguments
    *   Array of query arguments.
-   * @param $condition
+   * @param string $condition
    *   The condition to be built.
-   * @param $table
+   * @param array $table
    *   The right table.
-   * @param $select_query
+   * @param \Drupal\Core\Database\Query\SelectInterface $select_query
    *   The current select query being built.
-   * @param $left_table
+   * @param array $left_table
    *   The left table.
    */
   protected function joinAddExtra(&$arguments, &$condition, $table, SelectInterface $select_query, $left_table = NULL) {
@@ -320,15 +320,15 @@
   /**
     * Builds a single extra condition.
     *
-    * @param $info
+    * @param array $info
     *   The extra information
-    * @param $arguments
+    * @param array $arguments
     *   Array of query arguments.
-    * @param $table
+    * @param array $table
     *   The right table.
-    * @param $select_query
+    * @param \Drupal\Core\Database\Query\SelectInterface $select_query
     *   The current select query being built.
-    * @param $left
+    * @param array $left
     *   The left table.
     *
     * @return string