diff --git a/src/Configuration/Configuration.php b/src/Configuration/Configuration.php
index 6bbb102..f99aeab 100644
--- a/src/Configuration/Configuration.php
+++ b/src/Configuration/Configuration.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Configuration;
 
 class Configuration implements ConfigurationInterface
diff --git a/src/Configuration/ConfigurationInterface.php b/src/Configuration/ConfigurationInterface.php
index c00b894..5c97d4f 100644
--- a/src/Configuration/ConfigurationInterface.php
+++ b/src/Configuration/ConfigurationInterface.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Configuration;
 
 interface ConfigurationInterface
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 829b1b0..4dfc690 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\DependencyInjection;
 
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
@@ -23,6 +34,6 @@ public function getConfigTreeBuilder(): TreeBuilder
                 ->end()
             ->end();
 
-         return $treeBuilder;
+        return $treeBuilder;
     }
 }
diff --git a/src/DependencyInjection/DsLuceneExtension.php b/src/DependencyInjection/DsLuceneExtension.php
index ea630d7..7c834e5 100644
--- a/src/DependencyInjection/DsLuceneExtension.php
+++ b/src/DependencyInjection/DsLuceneExtension.php
@@ -1,11 +1,22 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\DependencyInjection;
 
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\Config\FileLocator;
 
 class DsLuceneExtension extends Extension
 {
diff --git a/src/DsLuceneBundle.php b/src/DsLuceneBundle.php
index 9603048..fd0c230 100644
--- a/src/DsLuceneBundle.php
+++ b/src/DsLuceneBundle.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle;
 
 use DynamicSearchBundle\Provider\Extension\ProviderBundleInterface;
diff --git a/src/DsLuceneEvents.php b/src/DsLuceneEvents.php
index fa40c97..9c34d38 100644
--- a/src/DsLuceneEvents.php
+++ b/src/DsLuceneEvents.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle;
 
 final class DsLuceneEvents
diff --git a/src/Event/AnalyzerEvent.php b/src/Event/AnalyzerEvent.php
index 688fbb4..783fb2b 100644
--- a/src/Event/AnalyzerEvent.php
+++ b/src/Event/AnalyzerEvent.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Event;
 
 use Symfony\Contracts\EventDispatcher\Event;
diff --git a/src/Exception/LuceneException.php b/src/Exception/LuceneException.php
index 7a2860a..7d35df2 100644
--- a/src/Exception/LuceneException.php
+++ b/src/Exception/LuceneException.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Exception;
 
 final class LuceneException extends \Exception
diff --git a/src/Factory/AnalyzerFactory.php b/src/Factory/AnalyzerFactory.php
index 9dbac03..1a94952 100644
--- a/src/Factory/AnalyzerFactory.php
+++ b/src/Factory/AnalyzerFactory.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Factory;
 
 use DsLuceneBundle\DsLuceneEvents;
diff --git a/src/Index/Field/AbstractType.php b/src/Index/Field/AbstractType.php
index 194db26..f253e58 100644
--- a/src/Index/Field/AbstractType.php
+++ b/src/Index/Field/AbstractType.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use DynamicSearchBundle\Index\IndexFieldInterface;
diff --git a/src/Index/Field/BinaryField.php b/src/Index/Field/BinaryField.php
index c38456b..be205bc 100644
--- a/src/Index/Field/BinaryField.php
+++ b/src/Index/Field/BinaryField.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use ZendSearch\Lucene;
diff --git a/src/Index/Field/KeywordField.php b/src/Index/Field/KeywordField.php
index 96b5753..79a02d4 100644
--- a/src/Index/Field/KeywordField.php
+++ b/src/Index/Field/KeywordField.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use ZendSearch\Lucene;
diff --git a/src/Index/Field/TextField.php b/src/Index/Field/TextField.php
index ffcaed1..93fba04 100644
--- a/src/Index/Field/TextField.php
+++ b/src/Index/Field/TextField.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use ZendSearch\Lucene;
diff --git a/src/Index/Field/UnIndexedField.php b/src/Index/Field/UnIndexedField.php
index eb0a137..5d078e2 100644
--- a/src/Index/Field/UnIndexedField.php
+++ b/src/Index/Field/UnIndexedField.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use ZendSearch\Lucene;
diff --git a/src/Index/Field/UnStoredField.php b/src/Index/Field/UnStoredField.php
index b5e68ca..8e0d964 100644
--- a/src/Index/Field/UnStoredField.php
+++ b/src/Index/Field/UnStoredField.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Index\Field;
 
 use ZendSearch\Lucene;
diff --git a/src/Lucene/Analyzer/CaseInsensitive.php b/src/Lucene/Analyzer/CaseInsensitive.php
index b6a2a4b..63dc710 100644
--- a/src/Lucene/Analyzer/CaseInsensitive.php
+++ b/src/Lucene/Analyzer/CaseInsensitive.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Lucene\Analyzer;
 
 use ZendSearch\Lucene\Analysis\Analyzer\Common;
diff --git a/src/Lucene/Analyzer/Syllable.php b/src/Lucene/Analyzer/Syllable.php
index cdf79c8..2c43c9e 100644
--- a/src/Lucene/Analyzer/Syllable.php
+++ b/src/Lucene/Analyzer/Syllable.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Lucene\Analyzer;
 
 use Org\Heigl\Hyphenator;
diff --git a/src/Lucene/Filter/AsciiFolding/AsciiFoldingFilter.php b/src/Lucene/Filter/AsciiFolding/AsciiFoldingFilter.php
index ca872c9..f756911 100644
--- a/src/Lucene/Filter/AsciiFolding/AsciiFoldingFilter.php
+++ b/src/Lucene/Filter/AsciiFolding/AsciiFoldingFilter.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Lucene\Filter\AsciiFolding;
 
 use ZendSearch\Lucene\Analysis\Token;
diff --git a/src/Lucene/Filter/Stemming/SnowBallStemmingFilter.php b/src/Lucene/Filter/Stemming/SnowBallStemmingFilter.php
index 0ef4aca..cf328a3 100644
--- a/src/Lucene/Filter/Stemming/SnowBallStemmingFilter.php
+++ b/src/Lucene/Filter/Stemming/SnowBallStemmingFilter.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Lucene\Filter\Stemming;
 
 use Wamania\Snowball\Stemmer;
@@ -11,7 +22,6 @@ class SnowBallStemmingFilter implements TokenFilterInterface
     public const MIN_TOKEN_LENGTH = 1;
 
     protected ?string $locale = null;
-
     protected array $cache = [];
     protected array $mapping = [
         'da' => 'Danish',
diff --git a/src/Modifier/TermModifier.php b/src/Modifier/TermModifier.php
index 33247e1..d4b592d 100644
--- a/src/Modifier/TermModifier.php
+++ b/src/Modifier/TermModifier.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Modifier;
 
 /**
diff --git a/src/Normalizer/DocumentKeyValueNormalizer.php b/src/Normalizer/DocumentKeyValueNormalizer.php
index bbe6f04..72d188b 100644
--- a/src/Normalizer/DocumentKeyValueNormalizer.php
+++ b/src/Normalizer/DocumentKeyValueNormalizer.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Normalizer;
 
 use DsLuceneBundle\Normalizer\Helper\LuceneDocumentDataExtractor;
@@ -39,6 +50,7 @@ public function normalize(RawResultInterface $rawResult, ContextDefinitionInterf
 
         if (!is_array($data)) {
             $message = sprintf('Data needs to be type of "array", "%s" given', is_object($data) ? get_class($data) : gettype($data));
+
             throw new NormalizerException($message, __CLASS__);
         }
 
diff --git a/src/Normalizer/Helper/LuceneDocumentDataExtractor.php b/src/Normalizer/Helper/LuceneDocumentDataExtractor.php
index b4179ef..599ea5d 100644
--- a/src/Normalizer/Helper/LuceneDocumentDataExtractor.php
+++ b/src/Normalizer/Helper/LuceneDocumentDataExtractor.php
@@ -1,10 +1,21 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Normalizer\Helper;
 
+use ZendSearch\Exception\ExceptionInterface;
 use ZendSearch\Lucene\Document\Field;
 use ZendSearch\Lucene\Search\QueryHit;
-use ZendSearch\Exception\ExceptionInterface;
 
 class LuceneDocumentDataExtractor
 {
diff --git a/src/OutputChannel/AutoCompleteOutputChannel.php b/src/OutputChannel/AutoCompleteOutputChannel.php
index 2b72f2f..7ebe1c1 100644
--- a/src/OutputChannel/AutoCompleteOutputChannel.php
+++ b/src/OutputChannel/AutoCompleteOutputChannel.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
@@ -9,10 +20,10 @@
 use DynamicSearchBundle\OutputChannel\OutputChannelInterface;
 use DynamicSearchBundle\OutputChannel\Query\SearchContainerInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use ZendSearch\Exception\ExceptionInterface;
 use ZendSearch\Lucene;
 use ZendSearch\Lucene\Search\Query;
 use ZendSearch\Lucene\Search\QueryParser;
-use ZendSearch\Exception\ExceptionInterface;
 
 class AutoCompleteOutputChannel implements OutputChannelInterface
 {
diff --git a/src/OutputChannel/Filter/RelationsFilter.php b/src/OutputChannel/Filter/RelationsFilter.php
index eb98aa9..dcc589c 100644
--- a/src/OutputChannel/Filter/RelationsFilter.php
+++ b/src/OutputChannel/Filter/RelationsFilter.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel\Filter;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
diff --git a/src/OutputChannel/Modifier/Filter/QueryCleanTermFilter.php b/src/OutputChannel/Modifier/Filter/QueryCleanTermFilter.php
index 9e07b05..b1e6f41 100644
--- a/src/OutputChannel/Modifier/Filter/QueryCleanTermFilter.php
+++ b/src/OutputChannel/Modifier/Filter/QueryCleanTermFilter.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel\Modifier\Filter;
 
 use DynamicSearchBundle\OutputChannel\Allocator\OutputChannelAllocatorInterface;
diff --git a/src/OutputChannel/Modifier/Filter/QueryTermBuildFilter.php b/src/OutputChannel/Modifier/Filter/QueryTermBuildFilter.php
index 0e7fcf8..41a3bf4 100644
--- a/src/OutputChannel/Modifier/Filter/QueryTermBuildFilter.php
+++ b/src/OutputChannel/Modifier/Filter/QueryTermBuildFilter.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel\Modifier\Filter;
 
 use DsLuceneBundle\Modifier\TermModifier;
diff --git a/src/OutputChannel/MultiSearchOutputChannel.php b/src/OutputChannel/MultiSearchOutputChannel.php
index 8cb0db2..16a1fd6 100644
--- a/src/OutputChannel/MultiSearchOutputChannel.php
+++ b/src/OutputChannel/MultiSearchOutputChannel.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
@@ -65,7 +76,6 @@ public function getMultiSearchResult(MultiSearchContainerInterface $multiSearchC
         $indexProviderOptions = $this->outputChannelContext->getIndexProviderOptions();
 
         foreach ($multiSearchContainer->getSearchContainer() as $searchContainer) {
-
             $query = $searchContainer->getQuery();
 
             $eventData = $this->eventDispatcher->dispatchAction('build_index', [
diff --git a/src/OutputChannel/SearchOutputChannel.php b/src/OutputChannel/SearchOutputChannel.php
index 0d74199..1573e65 100644
--- a/src/OutputChannel/SearchOutputChannel.php
+++ b/src/OutputChannel/SearchOutputChannel.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
diff --git a/src/OutputChannel/SuggestionsOutputChannel.php b/src/OutputChannel/SuggestionsOutputChannel.php
index d906a73..0083ea8 100644
--- a/src/OutputChannel/SuggestionsOutputChannel.php
+++ b/src/OutputChannel/SuggestionsOutputChannel.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\OutputChannel;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
diff --git a/src/Provider/LuceneIndexProvider.php b/src/Provider/LuceneIndexProvider.php
index bb096a2..0cb5471 100644
--- a/src/Provider/LuceneIndexProvider.php
+++ b/src/Provider/LuceneIndexProvider.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Provider;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
@@ -103,8 +114,10 @@ public function processDocument(ContextDefinitionInterface $contextDefinition, I
 
                     break;
                 default:
-                    throw new \Exception(sprintf('invalid context dispatch type "%s". cannot perform index provider dispatch.',
-                        $contextDefinition->getContextDispatchType()));
+                    throw new \Exception(sprintf(
+                        'invalid context dispatch type "%s". cannot perform index provider dispatch.',
+                        $contextDefinition->getContextDispatchType()
+                    ));
             }
         } catch (\Throwable $e) {
             throw new ProviderException($e->getMessage(), DsLuceneBundle::PROVIDER_NAME, $e);
diff --git a/src/Service/LuceneHandler.php b/src/Service/LuceneHandler.php
index 9104582..e29d785 100644
--- a/src/Service/LuceneHandler.php
+++ b/src/Service/LuceneHandler.php
@@ -1,12 +1,23 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Service;
 
 use DynamicSearchBundle\Document\IndexDocument;
+use ZendSearch\Exception\ExceptionInterface;
 use ZendSearch\Lucene\Document;
 use ZendSearch\Lucene\Index\Term;
 use ZendSearch\Lucene\SearchIndexInterface;
-use ZendSearch\Exception\ExceptionInterface;
 
 class LuceneHandler implements LuceneHandlerInterface
 {
diff --git a/src/Service/LuceneHandlerInterface.php b/src/Service/LuceneHandlerInterface.php
index 5136445..4a8f971 100644
--- a/src/Service/LuceneHandlerInterface.php
+++ b/src/Service/LuceneHandlerInterface.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Service;
 
 use DynamicSearchBundle\Document\IndexDocument;
diff --git a/src/Service/LuceneStorageBuilder.php b/src/Service/LuceneStorageBuilder.php
index f0c35b0..fbd049c 100644
--- a/src/Service/LuceneStorageBuilder.php
+++ b/src/Service/LuceneStorageBuilder.php
@@ -1,5 +1,16 @@
 <?php
 
+/*
+ * This source file is available under two different licenses:
+ *   - GNU General Public License version 3 (GPLv3)
+ *   - DACHCOM Commercial License (DCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) DACHCOM.DIGITAL AG (https://www.dachcom-digital.com)
+ * @license    GPLv3 and DCL
+ */
+
 namespace DsLuceneBundle\Service;
 
 use DsLuceneBundle\Configuration\ConfigurationInterface;
@@ -8,9 +19,9 @@
 use DsLuceneBundle\Factory\AnalyzerFactory;
 use DynamicSearchBundle\Exception\ProviderException;
 use Symfony\Component\Filesystem\Filesystem;
+use ZendSearch\Exception\ExceptionInterface;
 use ZendSearch\Lucene\Analysis\Analyzer\Analyzer;
 use ZendSearch\Lucene\Lucene;
-use ZendSearch\Exception\ExceptionInterface;
 use ZendSearch\Lucene\Search\QueryParser;
 use ZendSearch\Lucene\SearchIndexInterface;