diff --git a/Classes/Bootstrap.php b/Classes/Bootstrap.php
index ecfb784..0cd8a89 100644
--- a/Classes/Bootstrap.php
+++ b/Classes/Bootstrap.php
@@ -1,5 +1,4 @@
 <?php
-
 namespace Codappix\SearchCore;
 
 use Codappix\SearchCore\Compatibility\ExtensionConfigurationInterface;
@@ -25,4 +24,4 @@ class Bootstrap
             ExtensionConfigurationInterface::class
         );
     }
-}
\ No newline at end of file
+}
diff --git a/Classes/Compatibility/ExtensionConfiguration.php b/Classes/Compatibility/ExtensionConfiguration.php
index 3cb4214..fb72775 100644
--- a/Classes/Compatibility/ExtensionConfiguration.php
+++ b/Classes/Compatibility/ExtensionConfiguration.php
@@ -1,5 +1,4 @@
 <?php
-
 namespace Codappix\SearchCore\Compatibility;
 
 use Codappix\SearchCore\Bootstrap;
@@ -9,7 +8,7 @@ class ExtensionConfiguration implements ExtensionConfigurationInterface
     /**
      * @return object|\TYPO3\CMS\Core\Configuration\ExtensionConfiguration
      */
-    protected function _base()
+    private function base()
     {
         return Bootstrap::getObjectManager()->get(\TYPO3\CMS\Core\Configuration\ExtensionConfiguration::class);
     }
@@ -22,6 +21,6 @@ class ExtensionConfiguration implements ExtensionConfigurationInterface
      */
     public function get($extensionKey)
     {
-        return $this->_base()->get($extensionKey);
+        return $this->base()->get($extensionKey);
     }
 }
diff --git a/Classes/Compatibility/ExtensionConfigurationInterface.php b/Classes/Compatibility/ExtensionConfigurationInterface.php
index d12ccd3..f62ab2d 100644
--- a/Classes/Compatibility/ExtensionConfigurationInterface.php
+++ b/Classes/Compatibility/ExtensionConfigurationInterface.php
@@ -1,8 +1,7 @@
 <?php
-
 namespace Codappix\SearchCore\Compatibility;
 
 interface ExtensionConfigurationInterface
 {
     public function get($extensionKey);
-}
\ No newline at end of file
+}
diff --git a/Classes/Compatibility/ImplementationRegistrationService.php b/Classes/Compatibility/ImplementationRegistrationService.php
index 223e858..b8a3592 100644
--- a/Classes/Compatibility/ImplementationRegistrationService.php
+++ b/Classes/Compatibility/ImplementationRegistrationService.php
@@ -1,5 +1,4 @@
 <?php
-
 namespace Codappix\SearchCore\Compatibility;
 
 /*
@@ -43,7 +42,7 @@ class ImplementationRegistrationService
                 ExtensionConfigurationInterface::class,
                 ExtensionConfiguration::class
             );
-        } else if (VersionNumberUtility::convertVersionNumberToInteger(TYPO3_version) >= 8000000) {
+        } elseif (VersionNumberUtility::convertVersionNumberToInteger(TYPO3_version) >= 8000000) {
             $container->registerImplementation(
                 ExtensionConfigurationInterface::class,
                 Version87\ExtensionConfiguration::class
diff --git a/Classes/Compatibility/Version87/ExtensionConfiguration.php b/Classes/Compatibility/Version87/ExtensionConfiguration.php
index 86814fa..6ff91af 100644
--- a/Classes/Compatibility/Version87/ExtensionConfiguration.php
+++ b/Classes/Compatibility/Version87/ExtensionConfiguration.php
@@ -10,4 +10,4 @@ class ExtensionConfiguration implements ExtensionConfigurationInterface
     {
         return unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$extensionKey]);
     }
-}
\ No newline at end of file
+}
diff --git a/Classes/Configuration/ConfigurationContainer.php b/Classes/Configuration/ConfigurationContainer.php
index 4fd4fcc..4a93730 100644
--- a/Classes/Configuration/ConfigurationContainer.php
+++ b/Classes/Configuration/ConfigurationContainer.php
@@ -63,14 +63,14 @@ class ConfigurationContainer implements ConfigurationContainerInterface
     public function get(string $path)
     {
         $value = ArrayUtility::getValueByPath($this->settings, $path, '.');
-        
+
         if ($value === null) {
             throw new InvalidArgumentException(
                 'The given configuration option "' . $path . '" does not exist.',
                 InvalidArgumentException::OPTION_DOES_NOT_EXIST
             );
         }
-        
+
         return $value;
     }
 
@@ -80,12 +80,9 @@ class ConfigurationContainer implements ConfigurationContainerInterface
      */
     public function getIfExists(string $path)
     {
-        try
-        {
+        try {
             return ArrayUtility::getValueByPath($this->settings, $path, '.');
-        }
-        catch (\Exception $exception)
-        {
+        } catch (\Exception $exception) {
             return null;
         }
     }
diff --git a/Classes/Domain/Index/AbstractIndexer.php b/Classes/Domain/Index/AbstractIndexer.php
index 861c17a..a6a8946 100644
--- a/Classes/Domain/Index/AbstractIndexer.php
+++ b/Classes/Domain/Index/AbstractIndexer.php
@@ -1,5 +1,4 @@
 <?php
-
 namespace Codappix\SearchCore\Domain\Index;
 
 /*
@@ -34,28 +33,28 @@ abstract class AbstractIndexer implements IndexerInterface
      * @var ConnectionInterface
      */
     protected $connection;
-    
+
     /**
      * @var ConfigurationContainerInterface
      */
     protected $configuration;
-    
+
     /**
      * @var string
      */
     protected $identifier = '';
-    
+
     /**
      * @var \Codappix\SearchCore\DataProcessing\Service
      * @inject
      */
     protected $dataProcessorService;
-    
+
     /**
      * @var \TYPO3\CMS\Core\Log\Logger
      */
     protected $logger;
-    
+
     /**
      * Inject log manager to get concrete logger from it.
      *
@@ -65,18 +64,18 @@ abstract class AbstractIndexer implements IndexerInterface
     {
         $this->logger = $logManager->getLogger(__CLASS__);
     }
-    
+
     public function setIdentifier(string $identifier)
     {
         $this->identifier = $identifier;
     }
-    
+
     public function __construct(ConnectionInterface $connection, ConfigurationContainerInterface $configuration)
     {
         $this->connection = $connection;
         $this->configuration = $configuration;
     }
-    
+
     public function indexAllDocuments()
     {
         $this->logger->info('Start indexing');
@@ -84,24 +83,24 @@ abstract class AbstractIndexer implements IndexerInterface
             if ($records === null) {
                 break;
             }
-            
+
             foreach ($records as &$record) {
                 $this->prepareRecord($record);
             }
-            
+
             $this->logger->debug('Index records.', [$records]);
             $this->connection->addDocuments($this->getDocumentName(), $records);
         }
         $this->logger->info('Finish indexing');
     }
-    
+
     public function indexDocument(string $identifier)
     {
         $this->logger->info('Start indexing single record.', [$identifier]);
         try {
             $record = $this->getRecord((int)$identifier);
             $this->prepareRecord($record);
-            
+
             $this->connection->addDocument($this->getDocumentName(), $record);
         } catch (NoRecordFoundException $e) {
             $this->logger->info('Could not index document. Try to delete it therefore.', [$e->getMessage()]);
@@ -109,26 +108,25 @@ abstract class AbstractIndexer implements IndexerInterface
         }
         $this->logger->info('Finish indexing');
     }
-    
+
     public function delete()
     {
         $this->logger->info('Start deletion of index.');
         $this->connection->deleteIndex($this->getDocumentName());
         $this->logger->info('Finish deletion.');
     }
-    
+
     protected function getRecordGenerator(): \Generator
     {
         $offset = 0;
         $limit = $this->getLimit();
-        
+
         while (($records = $this->getRecords($offset, $limit)) !== []) {
             yield $records;
             $offset += $limit;
         }
     }
-    
-    
+
     /**
      * @param array $record
      *
@@ -137,12 +135,17 @@ abstract class AbstractIndexer implements IndexerInterface
     protected function prepareRecord(array &$record)
     {
         try {
-            $indexingConfiguration = $this->configuration->getIfExists('indexing.' . $this->identifier . '.dataProcessing');
-            
+            $indexingConfiguration = $this->configuration->getIfExists(
+                'indexing.' . $this->identifier . '.dataProcessing'
+            );
+
             if (!empty($indexingConfiguration) && is_array($indexingConfiguration)) {
                 foreach ($indexingConfiguration as $configuration) {
-                    $record = $this->dataProcessorService->executeDataProcessor($configuration, $record,
-                        $this->identifier);
+                    $record = $this->dataProcessorService->executeDataProcessor(
+                        $configuration,
+                        $record,
+                        $this->identifier
+                    );
                 }
             }
         } catch (\Exception $e) {
@@ -154,11 +157,10 @@ abstract class AbstractIndexer implements IndexerInterface
                 throw $e;
             }
         }
-        
+
         $this->handleAbstract($record);
     }
-    
-    
+
     /**
      * @param array $record
      *
@@ -167,11 +169,12 @@ abstract class AbstractIndexer implements IndexerInterface
     protected function handleAbstract(array &$record)
     {
         $record['search_abstract'] = '';
-        
+
         try {
-            
-            $indexConfiguration = $this->configuration->getIfExists('indexing.' . $this->identifier . '.abstractFields');
-            
+            $indexConfiguration = $this->configuration->getIfExists(
+                'indexing.' . $this->identifier . '.abstractFields'
+            );
+
             $fieldsToUse = GeneralUtility::trimExplode(',', $indexConfiguration);
             if ($fieldsToUse === []) {
                 return;
@@ -192,7 +195,7 @@ abstract class AbstractIndexer implements IndexerInterface
             }
         }
     }
-    
+
     /**
      * Returns the limit to use to fetch records.
      */
@@ -201,16 +204,16 @@ abstract class AbstractIndexer implements IndexerInterface
         // TODO: Make configurable.
         return 50;
     }
-    
+
     /**
      * @return array|null
      */
     abstract protected function getRecords(int $offset, int $limit);
-    
+
     /**
      * @throws NoRecordFoundException If record could not be found.
      */
     abstract protected function getRecord(int $identifier): array;
-    
+
     abstract protected function getDocumentName(): string;
 }