--- a/licenser/licenses.py	Thu Nov 24 15:01:16 2011 -0800
+++ b/licenser/licenses.py	Thu Nov 24 15:10:25 2011 -0800
@@ -71,8 +71,29 @@
 
     def __call__(self, license):
 
+        if self.isempty():
+            return # you're done
+        lines = self.lines()
+        
         # open the file for writing
-        raise NotImplementedError
+        f = file(self.filename, 'w')
+
+        # print the license
+        license_lines = license.splitlines():
+        for index, line in license_lines:
+            prefix = ' *'
+            suffix = ''
+            if index == len(license_lines) - 1:
+                suffix = ' */'
+            if not index:
+                prefix = '/*'
+            print >> f, '%s %s%s' % (prefix, line, suffix)
+
+        # print the rest of the file
+        for line in lines:
+            f.write(line)
+        f.close()
+
 
 class HashCommentsFile(CommentedFile):
 
@@ -95,14 +116,14 @@
             print >> f
 
         # print the license
-        f.write(license)
+        for line in license.splitlines():
+            print >> f, '# %s' % line
 
         # print the rest of the file
         for line in lines:
             f.write(line)
         f.close()
 
-
     def isempty(self, path):
         """
         determines if a file is empty;  that is, contains only comments

--- a/tests/doctest.txt	Thu Nov 24 15:01:16 2011 -0800
+++ b/tests/doctest.txt	Thu Nov 24 15:10:25 2011 -0800
@@ -15,4 +15,5 @@
 
     >>> license = licenses.MPL()
     >>> variables = {'author': 'Jeff Hammel', 'email': 'k0s@k0s.org'}
+    >>> variables = license.obtain_variables(**variables)
     >>> license.interpolate(directory, variables)