--- /dev/null
+<?php
+
+namespace Drupal\comment;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+
+/**
+ * Provides an interface defining a comment type entity.
+ */
+interface CommentTypeInterface extends ConfigEntityInterface {
+
+ /**
+ * Returns the comment type description.
+ *
+ * @return string
+ * The comment-type description.
+ */
+ public function getDescription();
+
+ /**
+ * Sets the description of the comment type.
+ *
+ * @param string $description
+ * The new description.
+ *
+ * @return $this
+ */
+ public function setDescription($description);
+
+ /**
+ * Gets the target entity type id for this comment type.
+ *
+ * @return string
+ * The target entity type id.
+ */
+ public function getTargetEntityTypeId();
+
+}