Encapsulate bootstrap bookmark functionality

release.py

@@ -13,10 +13,10 @@ pkg_resources.require('jaraco.packaging>=2.0')
 
 def before_upload():
     _linkify('CHANGES.txt', 'CHANGES (links).txt')
-    _add_bootstrap_bookmark()
+    BootstrapBookmark.add()
 
 def after_push():
-    _push_bootstrap_bookmark()
+    BootstrapBookmark.push()
 
 files_with_versions = (
     'ez_setup.py', 'setuptools/version.py',
@@ -61,12 +61,14 @@ def replacer(match):
             url = issue_urls[key].format(**match_dict)
             return "`{text} <{url}>`_".format(text=text, url=url)
 
-
-def _add_bootstrap_bookmark():
+class BootstrapBookmark:
+    @staticmethod
+    def add():
         cmd = ['hg', 'bookmark', '-i', 'bootstrap', '-f']
         subprocess.Popen(cmd)
 
-def _push_bootstrap_bookmark():
+    @staticmethod
+    def push():
         """
         Push the bootstrap bookmark
         """