diff --git a/core/lib/Drupal/Core/Config/TypedConfigManager.php b/core/lib/Drupal/Core/Config/TypedConfigManager.php
index 26c54fe..71aa0bc 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManager.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -11,11 +11,12 @@
 use Drupal\Component\Plugin\PluginManagerBase;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Component\Utility\String;
+use Drupal\Core\Config\TypedConfigManagerInterface;
 
 /**
  * Manages config type plugins.
  */
-class TypedConfigManager extends PluginManagerBase {
+class TypedConfigManager extends PluginManagerBase implements TypedConfigManagerInterface {
 
   /**
    * A storage controller instance for reading configuration data.
@@ -286,13 +287,7 @@ protected function replaceVariable($value, $data) {
   }
 
   /**
-   * Checks if the configuration schema with the given config name exists.
-   *
-   * @param string $name
-   *   Configuration name.
-   *
-   * @return bool
-   *   TRUE if configuration schema exists, FALSE otherwise.
+   * {@inheritdoc}
    */
   public function hasConfigSchema($name) {
     // The schema system falls back on the Property class for unknown types.
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
new file mode 100644
index 0000000..e80f569
--- /dev/null
+++ b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Config\TypedConfigManagerInterface.
+ */
+
+namespace Drupal\Core\Config;
+
+/**
+ * Interface for TypedConfigManagerInterface
+ *
+ * @package Drupal\Core\Config
+ */
+Interface TypedConfigManagerInterface {
+
+  /**
+   * Checks if the configuration schema with the given config name exists.
+   *
+   * @param string $name
+   *   Configuration name.
+   *
+   * @return bool
+   *   TRUE if configuration schema exists, FALSE otherwise.
+   */
+  public function hasConfigSchema($name);
+}