diff --git a/Utils/Encoding/Huffman/Huffman.php b/Utils/Encoding/Huffman/Huffman.php
index ded8b2513..d70b1fb8a 100644
--- a/Utils/Encoding/Huffman/Huffman.php
+++ b/Utils/Encoding/Huffman/Huffman.php
@@ -39,7 +39,7 @@ final class Huffman
      *
      * @since  1.0.0
      */
-    public function getDictionary() /* : ?Dictionary */
+    public function getDictionary() : ?Dictionary
     {
         return $this->dictionary;
     }
@@ -111,7 +111,7 @@ final class Huffman
      */
     public function decode(string $raw) : string
     {
-        if (empty($raw)) {
+        if (empty($raw) || $this->dictionary === null) {
             return '';
         }
 
diff --git a/Utils/Git/Commit.php b/Utils/Git/Commit.php
index fa5f4e5fa..f50931426 100644
--- a/Utils/Git/Commit.php
+++ b/Utils/Git/Commit.php
@@ -35,26 +35,26 @@ class Commit
     /**
      * Author.
      *
-     * @var null|Author
+     * @var Author
      * @since 1.0.0
      */
-    private ?Author $author = null;
+    private Author $author;
 
     /**
      * Branch.
      *
-     * @var null|Branch
+     * @var Branch
      * @since 1.0.0
      */
-    private ?Branch $branch = null;
+    private Branch $branch;
 
     /**
      * Tag.
      *
-     * @var null|Tag
+     * @var Tag
      * @since 1.0.0
      */
-    private ?Tag $tag = null;
+    private Tag $tag;
 
     /**
      * Commit date.
@@ -67,10 +67,10 @@ class Commit
     /**
      * Repository.
      *
-     * @var null|Repository
+     * @var Repository
      * @since 1.0.0
      */
-    private ?Repository $repository = null;
+    private Repository $repository;
 
     /**
      * Commit message.
diff --git a/Utils/Git/Repository.php b/Utils/Git/Repository.php
index 896055d48..23281c0a6 100644
--- a/Utils/Git/Repository.php
+++ b/Utils/Git/Repository.php
@@ -55,10 +55,10 @@ class Repository
     /**
      * Current branch.
      *
-     * @var null|Branch
+     * @var Branch
      * @since 1.0.0
      */
-    private ?Branch $branch = null;
+    private Branch $branch;
 
     /**
      * Constructor
@@ -72,6 +72,8 @@ class Repository
         if (\is_dir($path)) {
             $this->setPath($path);
         }
+
+        $this->branch = new Branch();
     }
 
     /**
diff --git a/Utils/NumericUtils.php b/Utils/NumericUtils.php
new file mode 100644
index 000000000..7393d1703
--- /dev/null
+++ b/Utils/NumericUtils.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @package    phpOMS\Utils
+ * @copyright  Dennis Eichhorn
+ * @license    OMS License 1.0
+ * @version    1.0.0
+ * @link       https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace phpOMS\Utils;
+
+/**
+ * Array utils.
+ *
+ * @package    phpOMS\Utils
+ * @license    OMS License 1.0
+ * @link       https://orange-management.org
+ * @since      1.0.0
+ */
+final class NumericUtils
+{
+
+    /**
+     * Constructor.
+     *
+     * @since  1.0.0
+     * @codeCoverageIgnore
+     */
+    private function __construct()
+    {
+    }
+
+    public static function uRightShift(int $a, int $b) : int
+    {
+        if ($b === 0) {
+            return $a;
+        }
+
+        return ($a >> $b) & ~(1 << (8 * \PHP_INT_SIZE - 1)>>($b - 1));
+    }
+}
diff --git a/Utils/StringCompare.php b/Utils/StringCompare.php
index 188b18d4a..44e2a26c2 100644
--- a/Utils/StringCompare.php
+++ b/Utils/StringCompare.php
@@ -174,8 +174,8 @@ final class StringCompare
      */
     public static function fuzzyMatch(
         string $s1, string $s2,
-        float $phraseWeight = 0.5, float $wordWeight = 1,
-        float $minWeight = 10, float $maxWeight = 1,
+        float $phraseWeight = 0.5, float $wordWeight = 1.0,
+        float $minWeight = 10.0, float $maxWeight = 1.0,
         float $lengthWeight = -0.3
     ) : float
     {
diff --git a/Utils/TaskSchedule/Interval.php b/Utils/TaskSchedule/Interval.php
index 8c0083bca..e6cd047cd 100644
--- a/Utils/TaskSchedule/Interval.php
+++ b/Utils/TaskSchedule/Interval.php
@@ -28,10 +28,10 @@ class Interval implements \Serializable
     /**
      * Start.
      *
-     * @var null|\DateTime
+     * @var \DateTime
      * @since 1.0.0
      */
-    private $start = null;
+    private $start;
 
     /**
      * End.
@@ -243,7 +243,7 @@ class Interval implements \Serializable
      *
      * @since  1.0.0
      */
-    public function getEnd()
+    public function getEnd() : ?\DateTime
     {
         return $this->end;
     }
diff --git a/Utils/TaskSchedule/TaskAbstract.php b/Utils/TaskSchedule/TaskAbstract.php
index 1464f1970..8fda2244f 100644
--- a/Utils/TaskSchedule/TaskAbstract.php
+++ b/Utils/TaskSchedule/TaskAbstract.php
@@ -59,18 +59,18 @@ abstract class TaskAbstract
     /**
      * Next runtime
      *
-     * @var null|\DateTime
+     * @var \DateTime
      * @since 1.0.0
      */
-    protected ?\DateTime $nextRunTime = null;
+    protected \DateTime $nextRunTime;
 
     /**
      * Last runtime
      *
-     * @var null|\DateTime
+     * @var \DateTime
      * @since 1.0.0
      */
-    protected ?\DateTime $lastRunTime = null;
+    protected \DateTime $lastRunTime;
 
     /**
      * Comment
@@ -203,7 +203,7 @@ abstract class TaskAbstract
      *
      * @since  1.0.0
      */
-    public function getNextRunTime()
+    public function getNextRunTime() : \DateTime
     {
         return $this->nextRunTime;
     }
@@ -229,7 +229,7 @@ abstract class TaskAbstract
      *
      * @since  1.0.0
      */
-    public function getLastRuntime()
+    public function getLastRuntime() : \DateTime
     {
         return $this->lastRunTime;
     }