diff --git a/library/Director/DirectorObject/Lookup/AppliedServiceInfo.php b/library/Director/DirectorObject/Lookup/AppliedServiceInfo.php
index 744952e5..5b0f4ff9 100644
--- a/library/Director/DirectorObject/Lookup/AppliedServiceInfo.php
+++ b/library/Director/DirectorObject/Lookup/AppliedServiceInfo.php
@@ -8,6 +8,10 @@ use Icinga\Module\Director\Db;
 use Icinga\Module\Director\Objects\HostApplyMatches;
 use Icinga\Module\Director\Objects\IcingaHost;
 
+/**
+ * A Service Apply Rule matching this Host, generating a Service with the given
+ * name
+ */
 class AppliedServiceInfo implements ServiceInfo
 {
     /** @var string */
diff --git a/library/Director/DirectorObject/Lookup/AppliedServiceSetServiceInfo.php b/library/Director/DirectorObject/Lookup/AppliedServiceSetServiceInfo.php
index b7840a3b..bd3587e2 100644
--- a/library/Director/DirectorObject/Lookup/AppliedServiceSetServiceInfo.php
+++ b/library/Director/DirectorObject/Lookup/AppliedServiceSetServiceInfo.php
@@ -8,6 +8,10 @@ use Icinga\Module\Director\Db;
 use Icinga\Module\Director\Objects\HostApplyMatches;
 use Icinga\Module\Director\Objects\IcingaHost;
 
+/**
+ * A Service that makes part of a Service Set Apply Rule matching this Host,
+ * generating a Service with the given name
+ */
 class AppliedServiceSetServiceInfo implements ServiceInfo
 {
     /** @var string */
diff --git a/library/Director/DirectorObject/Lookup/InheritedServiceInfo.php b/library/Director/DirectorObject/Lookup/InheritedServiceInfo.php
index ede98a0f..a542c387 100644
--- a/library/Director/DirectorObject/Lookup/InheritedServiceInfo.php
+++ b/library/Director/DirectorObject/Lookup/InheritedServiceInfo.php
@@ -7,6 +7,10 @@ use Icinga\Module\Director\Objects\IcingaHost;
 use Icinga\Module\Director\Objects\IcingaService;
 use Icinga\Module\Director\Repository\IcingaTemplateRepository;
 
+/**
+ * A Service attached to a parent Service Template. This is a shortcut for
+ * 'assign where "Template Name" in templates'
+ */
 class InheritedServiceInfo implements ServiceInfo
 {
     /** @var string */
diff --git a/library/Director/DirectorObject/Lookup/ServiceSetServiceInfo.php b/library/Director/DirectorObject/Lookup/ServiceSetServiceInfo.php
index ee8032be..ac913efe 100644
--- a/library/Director/DirectorObject/Lookup/ServiceSetServiceInfo.php
+++ b/library/Director/DirectorObject/Lookup/ServiceSetServiceInfo.php
@@ -6,6 +6,10 @@ use gipfl\IcingaWeb2\Url;
 use Icinga\Module\Director\Objects\IcingaHost;
 use Icinga\Module\Director\Repository\IcingaTemplateRepository;
 
+/**
+ * A service belonging to a Service Set, attached either directly to the given
+ * Host or to one of it's inherited Host Templates
+ */
 class ServiceSetServiceInfo implements ServiceInfo
 {
     /** @var string */
diff --git a/library/Director/DirectorObject/Lookup/SingleServiceInfo.php b/library/Director/DirectorObject/Lookup/SingleServiceInfo.php
index f9569014..91eaf633 100644
--- a/library/Director/DirectorObject/Lookup/SingleServiceInfo.php
+++ b/library/Director/DirectorObject/Lookup/SingleServiceInfo.php
@@ -6,6 +6,10 @@ use gipfl\IcingaWeb2\Url;
 use Icinga\Module\Director\Objects\IcingaHost;
 use Icinga\Module\Director\Objects\IcingaService;
 
+/**
+ * A single service, directly attached to a Host Object. Overrides might
+ * still be used when use_var_overrides is true.
+ */
 class SingleServiceInfo implements ServiceInfo
 {
     /** @var string */
@@ -20,7 +24,7 @@ class SingleServiceInfo implements ServiceInfo
     public function __construct($hostName, $serviceName, $useOverrides)
     {
         $this->hostName = $hostName;
-        $this->serviceName= $serviceName;
+        $this->serviceName = $serviceName;
         $this->useOverrides = $useOverrides;
     }
 
@@ -33,7 +37,7 @@ class SingleServiceInfo implements ServiceInfo
         $connection = $host->getConnection();
         if (IcingaService::exists($keyParams, $connection)) {
             $useOverrides = IcingaService::load($keyParams, $connection)
-                    ->getResolvedVar('use_var_overrides') === 'y';
+                ->getResolvedVar('use_var_overrides') === 'y';
 
             return new static($host->getObjectName(), $serviceName, $useOverrides);
         }