diff --git a/lib/generators/redmine_plugin_controller/redmine_plugin_controller_generator.rb b/lib/generators/redmine_plugin_controller/redmine_plugin_controller_generator.rb
index efe28c5..7f3f3f6 100644
--- a/lib/generators/redmine_plugin_controller/redmine_plugin_controller_generator.rb
+++ b/lib/generators/redmine_plugin_controller/redmine_plugin_controller_generator.rb
@@ -6,6 +6,7 @@ class RedminePluginControllerGenerator < ControllerGenerator
   
   def initialize(runtime_args, runtime_options = {})
     runtime_args = runtime_args.dup
+    usage if runtime_args.empty?
     @plugin_name = "redmine_" + runtime_args.shift.underscore
     @plugin_pretty_name = plugin_name.titleize
     @plugin_path = "vendor/plugins/#{plugin_name}"
diff --git a/lib/generators/redmine_plugin_model/redmine_plugin_model_generator.rb b/lib/generators/redmine_plugin_model/redmine_plugin_model_generator.rb
index 059a028..1c34439 100644
--- a/lib/generators/redmine_plugin_model/redmine_plugin_model_generator.rb
+++ b/lib/generators/redmine_plugin_model/redmine_plugin_model_generator.rb
@@ -6,6 +6,7 @@ class RedminePluginModelGenerator < ModelGenerator
   
   def initialize(runtime_args, runtime_options = {})
     runtime_args = runtime_args.dup
+    usage if runtime_args.empty?
     @plugin_name = "redmine_" + runtime_args.shift.underscore
     @plugin_pretty_name = plugin_name.titleize
     @plugin_path = "vendor/plugins/#{plugin_name}"