diff --git a/communication/apps.py b/communication/apps.py
new file mode 100644
index 0000000..e6c488d
--- /dev/null
+++ b/communication/apps.py
@@ -0,0 +1,4 @@
+from django.apps import AppConfig
+
+class CommunicationConfig(AppConfig):
+    name = 'communication'
diff --git a/communication/models.py b/communication/models.py
index 5ac52a3..c0d19a0 100644
--- a/communication/models.py
+++ b/communication/models.py
@@ -1,5 +1,6 @@
 from django.db import models
 from django.contrib.auth.models import User
+from django.utils.translation import ugettext_lazy as _
 
 
 class Notifying(models.Model):
@@ -14,8 +15,14 @@ class Notifying(models.Model):
 
 
 class Notification(models.Model):
-    sent_by = models.ForeignKey(Notifying)
-    about = models.ForeignKey(Notifying)
+    sent_by = models.ForeignKey(
+        Notifying,
+        related_name="notifs_sent"
+    )
+    about = models.ForeignKey(
+        Notifying,
+        related_name="notifs",
+    )
     to = models.ForeignKey(
         User,
         verbose_name=_("envoyée à")
@@ -32,7 +39,7 @@ class Commentable(Notifying):
 
 
 class Thread(models.Model):
-    topic = models.OneToOne(Commentable)
+    topic = models.OneToOneField(Commentable)
 
 
 class Comment(models.Model):
diff --git a/evenementiel/settings/common.py b/evenementiel/settings/common.py
index 61bf2d6..5d291cb 100644
--- a/evenementiel/settings/common.py
+++ b/evenementiel/settings/common.py
@@ -44,6 +44,7 @@ BASE_DIR = os.path.dirname(
 
 
 INSTALLED_APPS = [
+    'communication.apps.CommunicationConfig',
     'equipment.apps.EquipmentConfig',
     'event.apps.EventConfig',
     'users.apps.UsersConfig',
diff --git a/event/models.py b/event/models.py
index 186a3db..c1c89ce 100644
--- a/event/models.py
+++ b/event/models.py
@@ -7,6 +7,11 @@ from communication.models import Commentable, Notifying
 
 
 class Event(Commentable):
+    commentable_model = models.OneToOneField(
+        Commentable,
+        related_name="event_model",
+        parent_link=True
+    )
     title = models.CharField(
                     _("nom de l'évènement"),
                     max_length=200,