diff --git a/src/Controller/AdminPages/BaseAdminController.php b/src/Controller/AdminPages/BaseAdminController.php
index 9fb05dea..5fc8c5a8 100644
--- a/src/Controller/AdminPages/BaseAdminController.php
+++ b/src/Controller/AdminPages/BaseAdminController.php
@@ -197,7 +197,7 @@ abstract class BaseAdminController extends AbstractController
             //We can not use dynamic form events here, because the parent entity list is build from database!
             $form = $this->createForm($this->form_class, $entity, [
                 'attachment_class' => $this->attachment_class,
-                'parameter_class' => $this->parameter_class
+                'parameter_class' => $this->parameter_class,
             ]);
         } elseif ($form->isSubmitted() && ! $form->isValid()) {
             $this->addFlash('error', 'entity.edit_flash.invalid');
diff --git a/src/Controller/PartController.php b/src/Controller/PartController.php
index c24c09ab..45008d1e 100644
--- a/src/Controller/PartController.php
+++ b/src/Controller/PartController.php
@@ -135,7 +135,7 @@ class PartController extends AbstractController
                 'pictures' => $this->partPreviewGenerator->getPreviewAttachments($part),
                 'timeTravel' => $timeTravel_timestamp,
                 'description_params' => $parameterExtractor->extractParameters($part->getDescription()),
-                'comment_params' => $parameterExtractor->extractParameters($part->getComment())
+                'comment_params' => $parameterExtractor->extractParameters($part->getComment()),
             ]
         );
     }
diff --git a/src/Controller/UserController.php b/src/Controller/UserController.php
index 97738de0..a7d9ef5a 100644
--- a/src/Controller/UserController.php
+++ b/src/Controller/UserController.php
@@ -43,7 +43,6 @@ declare(strict_types=1);
 namespace App\Controller;
 
 use App\Entity\Attachments\UserAttachment;
-use App\Entity\Parameters\PartParameter;
 use App\Entity\UserSystem\User;
 use App\Form\Permissions\PermissionsType;
 use App\Form\UserAdminForm;
@@ -69,7 +68,7 @@ class UserController extends AdminPages\BaseAdminController
     protected $route_base = 'user';
     protected $attachment_class = UserAttachment::class;
     //Just define a value here to prevent error. It is not used.
-    protected $parameter_class = "not used";
+    protected $parameter_class = 'not used';
 
     /**
      * @Route("/{id}/edit/{timestamp}", requirements={"id"="\d+"}, name="user_edit")
diff --git a/src/DataFixtures/PartFixtures.php b/src/DataFixtures/PartFixtures.php
index b9a8a566..a47af181 100644
--- a/src/DataFixtures/PartFixtures.php
+++ b/src/DataFixtures/PartFixtures.php
@@ -89,16 +89,16 @@ class PartFixtures extends Fixture
 
         $orderdetail = new Orderdetail();
         $orderdetail->setSupplier($manager->find(Supplier::class, 1));
-        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(1.0)->setPrice("10.0"));
-        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(10.0)->setPrice("15.0"));
+        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(1.0)->setPrice('10.0'));
+        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(10.0)->setPrice('15.0'));
         $part->addOrderdetail($orderdetail);
 
         $orderdetail = new Orderdetail();
         $orderdetail->setSupplierpartnr('BC 547');
         $orderdetail->setObsolete(true);
         $orderdetail->setSupplier($manager->find(Supplier::class, 1));
-        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(1.0)->setPrice("10.0"));
-        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(10.0)->setPrice("15.1"));
+        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(1.0)->setPrice('10.0'));
+        $orderdetail->addPricedetail((new Pricedetail())->setPriceRelatedQuantity(10.0)->setPrice('15.1'));
         $part->addOrderdetail($orderdetail);
 
         $attachment = new PartAttachment();
diff --git a/src/DataTables/Column/LogEntryTargetColumn.php b/src/DataTables/Column/LogEntryTargetColumn.php
index d6c69655..e332edd5 100644
--- a/src/DataTables/Column/LogEntryTargetColumn.php
+++ b/src/DataTables/Column/LogEntryTargetColumn.php
@@ -44,7 +44,6 @@ namespace App\DataTables\Column;
 
 use App\Entity\Attachments\Attachment;
 use App\Entity\Base\AbstractDBElement;
-use App\Entity\Base\AbstractNamedDBElement;
 use App\Entity\Contracts\NamedElementInterface;
 use App\Entity\LogSystem\AbstractLogEntry;
 use App\Entity\Parameters\AbstractParameter;
@@ -99,7 +98,7 @@ class LogEntryTargetColumn extends AbstractColumn
         $tmp = '';
 
         //The element is existing
-        if ($target instanceof NamedElementInterface && !empty($target->getName())) {
+        if ($target instanceof NamedElementInterface && ! empty($target->getName())) {
             try {
                 $tmp = sprintf(
                     '<a href="%s">%s</a>',
@@ -126,15 +125,15 @@ class LogEntryTargetColumn extends AbstractColumn
 
         //Add a hint to the associated element if possible
         if (null !== $target && $this->options['show_associated']) {
-            if ($target instanceof Attachment && $target->getElement() !== null) {
+            if ($target instanceof Attachment && null !== $target->getElement()) {
                 $on = $target->getElement();
-            } elseif ($target instanceof AbstractParameter && $target->getElement() !== null) {
+            } elseif ($target instanceof AbstractParameter && null !== $target->getElement()) {
                 $on = $target->getElement();
-            } elseif ($target instanceof PartLot && $target->getPart() !== null) {
+            } elseif ($target instanceof PartLot && null !== $target->getPart()) {
                 $on = $target->getPart();
-            } elseif ($target instanceof Orderdetail && $target->getPart() !== null) {
+            } elseif ($target instanceof Orderdetail && null !== $target->getPart()) {
                 $on = $target->getPart();
-            } elseif ($target instanceof Pricedetail && $target->getOrderdetail() !== null && $target->getOrderdetail()->getPart() !== null) {
+            } elseif ($target instanceof Pricedetail && null !== $target->getOrderdetail() && null !== $target->getOrderdetail()->getPart()) {
                 $on = $target->getOrderdetail()->getPart();
             }
 
@@ -146,7 +145,7 @@ class LogEntryTargetColumn extends AbstractColumn
                         $this->elementTypeNameGenerator->getTypeNameCombination($on, true)
                     );
                 } catch (EntityNotSupportedException $exception) {
-                    $tmp .= ' (' . $this->elementTypeNameGenerator->getTypeNameCombination($target, true) .')';
+                    $tmp .= ' ('.$this->elementTypeNameGenerator->getTypeNameCombination($target, true).')';
                 }
             }
         }
diff --git a/src/DataTables/LogDataTable.php b/src/DataTables/LogDataTable.php
index 135e9717..abbcf127 100644
--- a/src/DataTables/LogDataTable.php
+++ b/src/DataTables/LogDataTable.php
@@ -212,7 +212,7 @@ class LogDataTable implements DataTableTypeInterface
 
         $dataTable->add('target', LogEntryTargetColumn::class, [
             'label' => $this->translator->trans('log.target'),
-            'show_associated' => $options['mode'] !== 'element_history',
+            'show_associated' => 'element_history' !== $options['mode'],
         ]);
 
         $dataTable->add('extra', LogEntryExtraColumn::class, [
diff --git a/src/Entity/Parameters/AbstractParameter.php b/src/Entity/Parameters/AbstractParameter.php
index 095df7ee..70665026 100644
--- a/src/Entity/Parameters/AbstractParameter.php
+++ b/src/Entity/Parameters/AbstractParameter.php
@@ -28,7 +28,6 @@ use App\Entity\Base\AbstractNamedDBElement;
 use Doctrine\ORM\Mapping as ORM;
 use InvalidArgumentException;
 use LogicException;
-use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
@@ -213,7 +212,8 @@ abstract class AbstractParameter extends AbstractNamedDBElement
     }
 
     /**
-     * Returns the name of the group this parameter is associated to (e.g. Technical Parameters)
+     * Returns the name of the group this parameter is associated to (e.g. Technical Parameters).
+     *
      * @return string
      */
     public function getGroup(): string
@@ -223,12 +223,13 @@ abstract class AbstractParameter extends AbstractNamedDBElement
 
     /**
      * Sets the name of the group this parameter is associated to.
-     * @param  string  $group
+     *
      * @return $this
      */
     public function setGroup(string $group): self
     {
         $this->group = $group;
+
         return $this;
     }
 
diff --git a/src/Entity/Parameters/ParametersTrait.php b/src/Entity/Parameters/ParametersTrait.php
index 192dd842..e543eff0 100644
--- a/src/Entity/Parameters/ParametersTrait.php
+++ b/src/Entity/Parameters/ParametersTrait.php
@@ -73,6 +73,7 @@ trait ParametersTrait
         foreach ($this->parameters as $parameter) {
             $tmp[$parameter->getGroup()][] = $parameter;
         }
+
         return $tmp;
     }
 }
diff --git a/src/Entity/Parts/PartLot.php b/src/Entity/Parts/PartLot.php
index 2b8676dd..ef82a8bd 100644
--- a/src/Entity/Parts/PartLot.php
+++ b/src/Entity/Parts/PartLot.php
@@ -328,9 +328,6 @@ class PartLot extends AbstractDBElement implements TimeStampableInterface, Named
         return $this;
     }
 
-    /**
-     * @inheritDoc
-     */
     public function getName(): string
     {
         return $this->description;
diff --git a/src/Entity/PriceInformations/Orderdetail.php b/src/Entity/PriceInformations/Orderdetail.php
index d938bfa3..84999672 100644
--- a/src/Entity/PriceInformations/Orderdetail.php
+++ b/src/Entity/PriceInformations/Orderdetail.php
@@ -361,9 +361,6 @@ class Orderdetail extends AbstractDBElement implements TimeStampableInterface, N
         return $this;
     }
 
-    /**
-     * @inheritDoc
-     */
     public function getName(): string
     {
         return $this->getSupplierPartNr();
diff --git a/src/EventSubscriber/EventLoggerSubscriber.php b/src/EventSubscriber/EventLoggerSubscriber.php
index f6c89e14..1a80188f 100644
--- a/src/EventSubscriber/EventLoggerSubscriber.php
+++ b/src/EventSubscriber/EventLoggerSubscriber.php
@@ -60,7 +60,7 @@ class EventLoggerSubscriber implements EventSubscriber
         Orderdetail::class => ['part'],
         Pricedetail::class => ['orderdetail'],
         Attachment::class => ['element'],
-        AbstractParameter::class => ['element']
+        AbstractParameter::class => ['element'],
     ];
 
     protected const MAX_STRING_LENGTH = 2000;
diff --git a/src/Form/AdminPages/BaseEntityAdminForm.php b/src/Form/AdminPages/BaseEntityAdminForm.php
index d1e029b9..09878973 100644
--- a/src/Form/AdminPages/BaseEntityAdminForm.php
+++ b/src/Form/AdminPages/BaseEntityAdminForm.php
@@ -45,7 +45,6 @@ namespace App\Form\AdminPages;
 use App\Entity\Attachments\Attachment;
 use App\Entity\Base\AbstractNamedDBElement;
 use App\Entity\Base\AbstractStructuralDBElement;
-use App\Entity\Parameters\PartParameter;
 use App\Form\AttachmentFormType;
 use App\Form\ParameterType;
 use App\Form\Type\MasterPictureAttachmentType;
diff --git a/src/Form/ParameterType.php b/src/Form/ParameterType.php
index 8cd66abd..413df3e4 100644
--- a/src/Form/ParameterType.php
+++ b/src/Form/ParameterType.php
@@ -113,14 +113,14 @@ class ParameterType extends AbstractType
             'attr' => [
                 'placeholder' => 'parameter.group.placeholder',
                 'class' => 'form-control-sm',
-            ]
+            ],
         ]);
     }
 
     public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
-                                   'data_class' => AbstractParameter::class,
-                               ]);
+            'data_class' => AbstractParameter::class,
+        ]);
     }
 }
diff --git a/src/Form/Part/PartBaseType.php b/src/Form/Part/PartBaseType.php
index 1610afcf..06ae6895 100644
--- a/src/Form/Part/PartBaseType.php
+++ b/src/Form/Part/PartBaseType.php
@@ -52,7 +52,6 @@ use App\Entity\Parts\MeasurementUnit;
 use App\Entity\Parts\Part;
 use App\Entity\PriceInformations\Orderdetail;
 use App\Form\AttachmentFormType;
-use App\Form\ParameterGroupType;
 use App\Form\ParameterType;
 use App\Form\Type\MasterPictureAttachmentType;
 use App\Form\Type\SIUnitType;
diff --git a/src/Form/Part/PartLotType.php b/src/Form/Part/PartLotType.php
index ac0e55c6..8d67e514 100644
--- a/src/Form/Part/PartLotType.php
+++ b/src/Form/Part/PartLotType.php
@@ -49,7 +49,6 @@ use App\Form\Type\SIUnitType;
 use App\Form\Type\StructuralEntityType;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
-use Symfony\Component\Form\Extension\Core\Type\DateTimeType;
 use Symfony\Component\Form\Extension\Core\Type\DateType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\FormBuilderInterface;
diff --git a/src/Migrations/Version20200311204104.php b/src/Migrations/Version20200311204104.php
index 0cd173d8..cd01e65a 100644
--- a/src/Migrations/Version20200311204104.php
+++ b/src/Migrations/Version20200311204104.php
@@ -27,11 +27,11 @@ final class Version20200311204104 extends AbstractMigration
         $this->addSql('ALTER TABLE `users` ADD perms_parts_parameters SMALLINT NOT NULL');
         $this->addSql('ALTER TABLE log CHANGE level level TINYINT');
 
-        $sql = 'UPDATE `groups`' .
+        $sql = 'UPDATE `groups`'.
             'SET perms_parts_parameters = 341 WHERE (id = 1 AND name = "admins") OR (id = 3 AND name = "users");';
         $this->addSql($sql);
 
-        $sql = 'UPDATE `groups`' .
+        $sql = 'UPDATE `groups`'.
             'SET perms_parts_parameters = 681 WHERE (id = 2 AND name = "readonly");';
         $this->addSql($sql);
 
diff --git a/src/Services/GitVersionInfo.php b/src/Services/GitVersionInfo.php
index 35669936..b1653e4f 100644
--- a/src/Services/GitVersionInfo.php
+++ b/src/Services/GitVersionInfo.php
@@ -64,9 +64,10 @@ class GitVersionInfo
             $git = file($this->project_dir.'/.git/HEAD');
             $head = explode('/', $git[0], 3);
 
-            if (!isset($head[2])) {
+            if (! isset($head[2])) {
                 return null;
             }
+
             return trim($head[2]);
         }
 
@@ -88,7 +89,7 @@ class GitVersionInfo
         if (file_exists($filename)) {
             $head = file($filename);
 
-            if (!isset($head[0])) {
+            if (! isset($head[0])) {
                 return null;
             }
 
diff --git a/src/Services/Parameters/ParameterExtractor.php b/src/Services/Parameters/ParameterExtractor.php
index 835d4fa0..64903ee5 100644
--- a/src/Services/Parameters/ParameterExtractor.php
+++ b/src/Services/Parameters/ParameterExtractor.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
  *
@@ -20,31 +23,29 @@
 
 namespace App\Services\Parameters;
 
-
 use App\Entity\Parameters\AbstractParameter;
 use App\Entity\Parameters\PartParameter;
 
 class ParameterExtractor
 {
-    protected const ALLOWED_PARAM_SEPARATORS = [", ", "\n"];
+    protected const ALLOWED_PARAM_SEPARATORS = [', ', "\n"];
 
     protected const CHAR_LIMIT = 1000;
 
     /**
      * Tries to extract parameters from the given string.
      * Useful for extraction from part description and comment.
-     * @param  string  $input
-     * @param string $class
+     *
      * @return AbstractParameter[]
      */
     public function extractParameters(string $input, string $class = PartParameter::class): array
     {
-        if (!is_a($class, AbstractParameter::class, true)) {
+        if (! is_a($class, AbstractParameter::class, true)) {
             throw new \InvalidArgumentException('$class must be a child class of AbstractParameter!');
         }
 
         //Restrict search length
-        $input = mb_strimwidth($input,0,self::CHAR_LIMIT);
+        $input = mb_strimwidth($input, 0, self::CHAR_LIMIT);
 
         $parameters = [];
 
@@ -52,7 +53,7 @@ class ParameterExtractor
         $split = $this->splitString($input);
         foreach ($split as $param_string) {
             $tmp = $this->stringToParam($param_string, $class);
-            if ($tmp !== null) {
+            if (null !== $tmp) {
                 $parameters[] = $tmp;
             }
         }
@@ -67,7 +68,7 @@ class ParameterExtractor
 
         $matches = [];
         \preg_match($regex, $input, $matches);
-        if (!empty($matches)) {
+        if (! empty($matches)) {
             [$raw, $name, $value] = $matches;
             $value = trim($value);
 
@@ -90,7 +91,8 @@ class ParameterExtractor
     protected function splitString(string $input): array
     {
         //Allow comma as limiter (include space, to prevent splitting in german style numbers)
-        $input = str_replace(static::ALLOWED_PARAM_SEPARATORS, ";", $input);
-        return explode(";", $input);
+        $input = str_replace(static::ALLOWED_PARAM_SEPARATORS, ';', $input);
+
+        return explode(';', $input);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Services/Parameters/ParameterExtractorTest.php b/tests/Services/Parameters/ParameterExtractorTest.php
index b88f0ab7..94b79576 100644
--- a/tests/Services/Parameters/ParameterExtractorTest.php
+++ b/tests/Services/Parameters/ParameterExtractorTest.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
  *
@@ -26,10 +29,9 @@ use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
 
 class ParameterExtractorTest extends WebTestCase
 {
-
     protected $service;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         parent::setUp();
         //Get an service instance.
@@ -40,26 +42,26 @@ class ParameterExtractorTest extends WebTestCase
     public function emptyDataProvider(): array
     {
         return [
-            [""],
-            ["      "],
+            [''],
+            ['      '],
             ["\t\n"],
-            [":;"],
-            ["NPN Transistor"],
-            ["=BC547 rewr"],
-            ["<i>For good</i>, [b]bad[/b], evil"],
-            ["Param:; Test"]
+            [':;'],
+            ['NPN Transistor'],
+            ['=BC547 rewr'],
+            ['<i>For good</i>, [b]bad[/b], evil'],
+            ['Param:; Test'],
         ];
     }
 
     /**
      * @dataProvider emptyDataProvider
      */
-    public function testShouldReturnEmpty(string $input)
+    public function testShouldReturnEmpty(string $input): void
     {
         $this->assertEmpty($this->service->extractParameters($input));
     }
 
-    public function testExtract()
+    public function testExtract(): void
     {
         $parameters = $this->service->extractParameters(' Operating Voltage:  10 V; Property : Value, Ström=1A (Test)');
         $this->assertContainsOnly(AbstractParameter::class, $parameters);
@@ -70,6 +72,5 @@ class ParameterExtractorTest extends WebTestCase
         $this->assertSame('Value', $parameters[1]->getValueText());
         $this->assertSame('Ström', $parameters[2]->getName());
         $this->assertSame('1A (Test)', $parameters[2]->getValueText());
-
     }
 }