diff --git a/compose/docker-compose.override.yml-blackfire b/compose/docker-compose.override.yml-blackfire
index 0d68ffbd..511154d3 100644
--- a/compose/docker-compose.override.yml-blackfire
+++ b/compose/docker-compose.override.yml-blackfire
@@ -1,6 +1,11 @@
+# vim: set ft=yaml:
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # Blackfire
+  # -----------------------------------------------------------------------------------------------
   blackfire:
     image: blackfire/blackfire:${BLACKFIRE:-latest}
     hostname: blackfire
diff --git a/compose/docker-compose.override.yml-elk b/compose/docker-compose.override.yml-elk
index a6606012..d598ee7e 100644
--- a/compose/docker-compose.override.yml-elk
+++ b/compose/docker-compose.override.yml-elk
@@ -4,6 +4,10 @@
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # ELK Stack
+  # -----------------------------------------------------------------------------------------------
   elastic:
     image: docker.elastic.co/elasticsearch/elasticsearch-oss:${ELK_SERVER:-6.6.1}
     hostname: elastic
diff --git a/compose/docker-compose.override.yml-mailhog b/compose/docker-compose.override.yml-mailhog
index 73c6bfe8..c9838506 100644
--- a/compose/docker-compose.override.yml-mailhog
+++ b/compose/docker-compose.override.yml-mailhog
@@ -1,6 +1,11 @@
+# vim: set ft=yaml:
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # MailHog
+  # -----------------------------------------------------------------------------------------------
   mailhog:
     image: mailhog/mailhog:${MAILHOG_SERVER:-latest}
     hostname: mailhog
diff --git a/compose/docker-compose.override.yml-rabbitmq b/compose/docker-compose.override.yml-rabbitmq
index 2ba5ae61..9ec65760 100644
--- a/compose/docker-compose.override.yml-rabbitmq
+++ b/compose/docker-compose.override.yml-rabbitmq
@@ -1,6 +1,11 @@
+# vim: set ft=yaml:
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # RabbitMQ
+  # -----------------------------------------------------------------------------------------------
   rabbit:
     image: rabbitmq:${RABBIT_SERVER:-management}
     hostname: rabbit
diff --git a/compose/docker-compose.override.yml-solr b/compose/docker-compose.override.yml-solr
index 8f9d1c33..f7820aef 100644
--- a/compose/docker-compose.override.yml-solr
+++ b/compose/docker-compose.override.yml-solr
@@ -1,6 +1,11 @@
+# vim: set ft=yaml:
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # Solr
+  # -----------------------------------------------------------------------------------------------
   solr:
     image: solr:${SOLR_SERVER:-latest}
     hostname: solr
diff --git a/compose/docker-compose.override.yml-varnish b/compose/docker-compose.override.yml-varnish
index 164a520a..390c0f89 100644
--- a/compose/docker-compose.override.yml-varnish
+++ b/compose/docker-compose.override.yml-varnish
@@ -1,6 +1,11 @@
+# vim: set ft=yaml:
 version: '2.1'
 
 services:
+
+  # -----------------------------------------------------------------------------------------------
+  # Varnish
+  # -----------------------------------------------------------------------------------------------
   varnish:
     image: devilbox/varnish:${VARNISH_SERVER:-6}
     hostname: varnish