fixed formatter exception

Author: mtrajano

src/Formatters/JsonFormatter.php

@@ -2,12 +2,14 @@
 
 namespace Mtrajano\LaravelSwagger\Formatters;
 
+use Mtrajano\LaravelSwagger\LaravelSwaggerException;
+
 class JsonFormatter extends Formatter
 {
     public function format()
     {
         if (!extension_loaded('json')) {
-            throw new \Exception('JSON extension must be loaded to use the json output format');
+            throw new LaravelSwaggerException('JSON extension must be loaded to use the json output format');
         }
 
         return json_encode($this->docs, JSON_PRETTY_PRINT);

src/Formatters/YamlFormatter.php

@@ -2,12 +2,14 @@
 
 namespace Mtrajano\LaravelSwagger\Formatters;
 
+use Mtrajano\LaravelSwagger\LaravelSwaggerException;
+
 class YamlFormatter extends Formatter
 {
     public function format()
     {
         if (!extension_loaded('yaml')) {
-            throw new \Exception('YAML extension must be loaded to use the yaml output format');
+            throw new LaravelSwaggerException('YAML extension must be loaded to use the yaml output format');
         }
 
         return yaml_emit($this->docs);