Added docheader tool.

.docheader

@@ -0,0 +1,5 @@
+/**
+ * @see       https://github.com/zendframework/ZendService_Amazon for the canonical source repository
+ * @copyright Copyright (c) %regexp:(20\d{2}-)?20\d{2}% Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/ZendService_Amazon/blob/master/LICENSE.md New BSD License
+ */

CONTRIBUTING.md

@@ -56,6 +56,18 @@ $ composer cs-fix
 If you allow `phpcbf` to fix CS issues, please re-run the tests to ensure
 they pass, and make sure you add and commit the changes after verification.
 
+## Running License Checks
+
+File-level docblocks should follow the format demonstrated in `.docheader`. To
+check for conformity, use:
+
+```console
+$ composer license-check
+```
+
+This will flag files that are incorrect, which you can then update. Re-run the
+tool to verify your changes.
+
 ## Recommended Workflow for Contributions
 
 Your first step is to establish a public repository from which we can

composer.json

@@ -31,6 +31,7 @@
         "zendframework/zendxml": "^1.0"
     },
     "require-dev": {
+        "malukenho/docheader": "^0.1.5",
         "phpunit/phpunit": "^6.0.8 || ^5.7.15",
         "zendframework/zend-coding-standard": "~1.0.0",
         "zendframework/zend-i18n": "~2.0"
@@ -55,6 +56,6 @@
         "cs-fix": "phpcbf",
         "test": "phpunit --colors=always",
         "test-coverage": "phpunit --coverage-clover clover.xml",
-        "license-check": "true"
-}
+        "license-check": "vendor/bin/docheader check library/ tests/"
+    }
 }