Add custom MutexRuntimeException

src/MutexRuntimeException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace Illuminated\Console;
+
+use RuntimeException;
+
+class MutexRuntimeException extends RuntimeException
+{
+}

src/WithoutOverlapping.php

@@ -2,7 +2,6 @@
 
 namespace Illuminated\Console;
 
-use RuntimeException;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
@@ -19,15 +18,15 @@ protected function initializeMutex()
     {
         $mutex = new Mutex($this);
         if (!$mutex->acquireLock($this->getMutexTimeout())) {
-            throw new RuntimeException('Command is running now!');
+            throw new MutexRuntimeException('Command is running now!');
         }
 
         register_shutdown_function([$this, 'releaseMutexLock'], $mutex);
     }
 
     public function getMutexStrategy()
     {
-        return (property_exists($this, 'mutexStrategy') ? $this->mutexStrategy : 'file');
+        return property_exists($this, 'mutexStrategy') ? $this->mutexStrategy : 'file';
     }
 
     public function setMutexStrategy($strategy)
@@ -37,7 +36,7 @@ public function setMutexStrategy($strategy)
 
     public function getMutexTimeout()
     {
-        return (property_exists($this, 'mutexTimeout') ? $this->mutexTimeout : 0);
+        return property_exists($this, 'mutexTimeout') ? $this->mutexTimeout : 0;
     }
 
     public function setMutexTimeout($timeout)