diff --git a/src/Utils/FileSystem/Exception/BadEnvException.php b/src/Utils/FileSystem/Exception/BadEnvException.php
new file mode 100644
index 0000000..3a561a4
--- /dev/null
+++ b/src/Utils/FileSystem/Exception/BadEnvException.php
@@ -0,0 +1,4 @@
+<?php
+namespace Bsr\Utils\FileSystem\Exception;
+
+class BadEnvException extends \Exception {}
\ No newline at end of file
diff --git a/src/Utils/FileSystem/FileSystem.php b/src/Utils/FileSystem/FileSystem.php
index 8a39da6..646ba4a 100644
--- a/src/Utils/FileSystem/FileSystem.php
+++ b/src/Utils/FileSystem/FileSystem.php
@@ -1,6 +1,8 @@
 <?php
 namespace Bsr\Utils\FileSystem;
 
+use Bsr\Utils\FileSystem\Exception\BadEnvException;
+
 class FileSystem
 {
     /**
@@ -24,7 +26,7 @@ class FileSystem
             if (!file_exists($buildPath . "/$part")) {
                 if (!is_writable($buildPath)) {
                     if ($throw) {
-                        throw new Exception("Attempting to create : $path, but $buildPath is not writeable.");
+                        throw new BadEnvException("Attempting to create : $path, but $buildPath is not writeable.");
                     }
                     return false;
                 }