diff --git a/lib/petrify.rb b/lib/petrify.rb
index 5ca26ea..b1a5e2b 100644
--- a/lib/petrify.rb
+++ b/lib/petrify.rb
@@ -13,6 +13,7 @@ module Petrify
   @@log = Logger.new($stdout)
   @@log.level = Logger::INFO
 
+  # Write an HTML page using a specified template and optional data
   def self.page(path_items, template, locals = {})
     dir = create_path(path_items)
     fn = File.join(dir, 'index.html')
@@ -28,6 +29,7 @@ module Petrify
     # https://support.google.com/webmasters/answer/183668?hl=en&ref_topic=4581190
   end
 
+  # Write a CSV file
   def self.csv(path_items, filename, data)
     dir = create_path(path_items)
     fn = File.join(dir, filename + '.csv')
@@ -40,6 +42,14 @@ module Petrify
     File.write(fn, csv_string)
     @@log.info fn
   end
+  
+  # Write an arbitrary file to output (eg a JSON file)
+  def self.file(path_items, filename, data)
+    dir = create_path(path_items)
+    fn = File.join(dir, filename)    
+    File.write(fn, data)
+    @@log.info fn
+  end
 
   def self.setup
     # Recursively delete working directory to ensure no redundant files are left behind from previous builds.
diff --git a/lib/petrify/version.rb b/lib/petrify/version.rb
index 59b8a0d..f1013e4 100644
--- a/lib/petrify/version.rb
+++ b/lib/petrify/version.rb
@@ -1,3 +1,3 @@
 module Petrify
-  VERSION = "0.3.1"
+  VERSION = "0.4.0"
 end