diff --git a/src/API/LDAPApiProviderInterface.php b/src/API/LDAPApiProviderInterface.php
index 29cd2649e1bd91102160649d9f22bed41ef6f6ec..396c22654f890c123869f45ed81e82c5de2a213c 100644
--- a/src/API/LDAPApiProviderInterface.php
+++ b/src/API/LDAPApiProviderInterface.php
@@ -10,19 +10,11 @@ interface LDAPApiProviderInterface
 {
     /**
      * Allows manipulation of the person with a hash array of $attributes at the end of "personFromUserItem".
-     *
-     * @param array $attributes
-     * @param Person $person
-     * @param bool $full
      */
     public function personFromUserItemPostHook(array $attributes, Person $person, bool $full = false);
 
     /**
      * Allows to fetch a person for a services by service id.
-     *
-     * @param string $service
-     * @param string $serviceID
-     * @return Person
      */
     public function getPersonForExternalServiceHook(string $service, string $serviceID): Person;
 }
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index c028728ae6c1b6290f8551a5ff59cdb2aa48484b..4cac8a9204fc78392742d5db6cc8145b736e50fb 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Dbp\Relay\LdapPersonProviderBundle\DependencyInjection;
 
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
@@ -19,7 +20,11 @@ class Configuration implements ConfigurationInterface
             ->scalarNode('person_cache_path')->end()
             ->scalarNode('ldap_cache_path')->end()
             ->end();
-        $treeBuilder->getRootNode()->append($cacheNode);
+
+        /** @var ArrayNodeDefinition $rootNode */
+        $rootNode = $treeBuilder->getRootNode();
+
+        $rootNode->append($cacheNode);
 
         $ldapBuilder = new TreeBuilder('ldap');
         $ldapNode = $ldapBuilder->getRootNode()
@@ -41,7 +46,7 @@ class Configuration implements ConfigurationInterface
             ->end();
         $ldapNode->append($attributesNode);
 
-        $treeBuilder->getRootNode()->append($ldapNode);
+        $rootNode->append($ldapNode);
 
         return $treeBuilder;
     }
diff --git a/src/Service/DummyLDAPApiProvider.php b/src/Service/DummyLDAPApiProvider.php
index 2733138a18aba5d71f42f34d0e9b5596e1ef01d3..4ed67b1debf625ca32eb3aa68eb9c608db5f6f8d 100644
--- a/src/Service/DummyLDAPApiProvider.php
+++ b/src/Service/DummyLDAPApiProvider.php
@@ -21,7 +21,8 @@ class DummyLDAPApiProvider implements LDAPApiProviderInterface
 //        $person->setBirthDate($birthDate);
     }
 
-    public function getPersonForExternalServiceHook(string $service, string $serviceID): Person {
+    public function getPersonForExternalServiceHook(string $service, string $serviceID): Person
+    {
         // For example, you can use the service and serviceID to get the person from some other service.
 
 //        if ($service === 'SOME-SERVICE') {
diff --git a/src/Service/LDAPApi.php b/src/Service/LDAPApi.php
index 075855eca13194d9b0fb9bcaacd99352ccd944f3..8caed5a10644ea3a5ca24f1b2732c915d3e63700 100644
--- a/src/Service/LDAPApi.php
+++ b/src/Service/LDAPApi.php
@@ -23,7 +23,6 @@ use Psr\Cache\CacheItemPoolInterface;
 use Psr\Container\ContainerInterface;
 use Psr\Log\LoggerAwareInterface;
 use Psr\Log\LoggerAwareTrait;
-use Symfony\Component\Cache\Adapter\FilesystemAdapter;
 use Symfony\Component\Cache\Psr16Cache;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\HttpFoundation\Response;
@@ -267,7 +266,7 @@ class LDAPApi implements LoggerAwareInterface, ServiceSubscriberInterface
 
         // Remove all value with numeric keys
         $attributes = [];
-        foreach($user->getAttributes() as $key => $value) {
+        foreach ($user->getAttributes() as $key => $value) {
             if (!is_numeric($key)) {
                 $attributes[$key] = $value;
             }