diff --git a/client/core/src/lib/event-emitter.js b/client/core/src/lib/event-emitter.js
index 0876ddbc7..20b2e94ff 100644
--- a/client/core/src/lib/event-emitter.js
+++ b/client/core/src/lib/event-emitter.js
@@ -1,5 +1,8 @@
 import {kebabToCamel} from './string';
 
+/**
+ * Implemented by all those classes that emit events.
+ */
 export default class EventEmitter {
     constructor($element, $scope) {
         if (!$element) return;