Fix formatting and interfaces in nearly every file

app/Exceptions/BidExists.php

@@ -1,16 +1,21 @@
 <?php
-/**
- *
- */
 
 namespace App\Exceptions;
 
 use Symfony\Component\HttpKernel\Exception\HttpException;
 
+/**
+ * Class BidExists
+ * @package App\Exceptions
+ */
 class BidExists extends HttpException
 {
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
-    {
+    public function __construct(
+        string $message = null,
+        \Exception $previous = null,
+        int $code = 0,
+        array $headers = []
+    ) {
         parent::__construct(
             409,
             'A bid already exists for this flight',