diff --git a/core/lib/Drupal/Core/Routing/EnhancerInterface.php b/core/lib/Drupal/Core/Routing/EnhancerInterface.php
new file mode 100644
index 0000000..3ddee66
--- /dev/null
+++ b/core/lib/Drupal/Core/Routing/EnhancerInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Cmf\Component\Routing\Enhancer\RouteEnhancerInterface;
+
+/**
+ * A route enhance service to determine route enhance rules.
+ */
+interface EnhancerInterface extends RouteEnhancerInterface {
+
+}
diff --git a/core/lib/Drupal/Core/Routing/FilterInterface.php b/core/lib/Drupal/Core/Routing/FilterInterface.php
new file mode 100644
index 0000000..73c9f83
--- /dev/null
+++ b/core/lib/Drupal/Core/Routing/FilterInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Cmf\Component\Routing\NestedMatcher\RouteFilterInterface;
+
+/**
+ * A route filter service to filter down the collection of route instances.
+ */
+interface FilterInterface extends RouteFilterInterface {
+
+}