diff --git a/components/event_store/service/event_logger.py b/components/event_store/service/event_logger.py
index 1834e14..326d71e 100644
--- a/components/event_store/service/event_logger.py
+++ b/components/event_store/service/event_logger.py
@@ -22,10 +22,16 @@ class EventLogger:
         self.verbose = verbose
 
     def setup_msq_queue(self):
+        """
+        Sets up the message queue which calls self.log on msg receive.
+        """
         mb = MBWrapper(exchange_name='logger', callback=self.log)
         mb.setup_receiver()
 
     def get_keys(self):
+        """
+        Returns the available redis keys.
+        """
         return json.dumps([key.decode() for key in self.redis.keys()])
 
     def get_list_of(self, key):
@@ -48,6 +54,13 @@ class EventLogger:
         return key.decode() if key else json.dumps("")
 
     def log(self, msg):
+        """
+        Logging callback. Logs the msg depending on its type to the respective redis key.
+        Types can be DAF, TrafficLightState or TargetVelocity. If type is unknown, message is still logged as key
+        UNKNOWN.
+
+        :param msg: pickled msg binary to log
+        """
         try:
             msg = pickle.loads(msg)
         except Exception as e:
diff --git a/components/event_store/service/event_store_server.py b/components/event_store/service/event_store_server.py
index 39fdc17..ecb79bd 100644
--- a/components/event_store/service/event_store_server.py
+++ b/components/event_store/service/event_store_server.py
@@ -37,16 +37,28 @@ def get_keys():
 
 @app.route("/api/keys")
 def api_get_keys():
+    """
+    :return: list of available redis keys
+    """
     return el.get_keys()
 
 
 @app.route("/api/keys/<key>/")
 def api_get_of_key(key):
+    """
+    :param key: key to get data of
+    :return: list of data to the respective key
+    """
     return el.get_list_of(key)
 
 
 @app.route("/api/keys/<key>/<index>/")
 def api_get_index_of_key(key, index):
+    """
+    :param key: key to get data element of
+    :param index: index of keys data list
+    :return: element matching index of key
+    """
     return el.get_index_of(key, index)