diff --git a/init.rb b/init.rb
index b7d9116..165f46e 100644
--- a/init.rb
+++ b/init.rb
@@ -30,3 +30,8 @@ Redmine::Plugin.register :redmine_rate do
   
   permission :view_rate, { }
 end
+
+require 'redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook'
+require 'redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook'
+require 'redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook'
+require 'redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook'
diff --git a/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook.rb b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook.rb
new file mode 100644
index 0000000..8edde5b
--- /dev/null
+++ b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook.rb
@@ -0,0 +1,9 @@
+module RedmineRate
+  module Hooks
+    class PluginTimesheetViewsTimesheetGroupHeaderHook < Redmine::Hook::ViewListener
+      def plugin_timesheet_views_timesheet_group_header(context={})
+        return ''
+      end
+    end
+  end
+end
diff --git a/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook.rb b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook.rb
new file mode 100644
index 0000000..4254428
--- /dev/null
+++ b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook.rb
@@ -0,0 +1,9 @@
+module RedmineRate
+  module Hooks
+    class PluginTimesheetViewsTimesheetTimeEntryHook < Redmine::Hook::ViewListener
+      def plugin_timesheet_views_timesheet_time_entry(context={})
+        return ''
+      end
+    end
+  end
+end
diff --git a/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook.rb b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook.rb
new file mode 100644
index 0000000..67f57a1
--- /dev/null
+++ b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook.rb
@@ -0,0 +1,9 @@
+module RedmineRate
+  module Hooks
+    class PluginTimesheetViewsTimesheetTimeEntrySumHook < Redmine::Hook::ViewListener
+      def plugin_timesheet_views_timesheet_time_entry_sum(context={})
+        return ''
+      end
+    end
+  end
+end
diff --git a/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook.rb b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook.rb
new file mode 100644
index 0000000..0b4ea33
--- /dev/null
+++ b/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook.rb
@@ -0,0 +1,9 @@
+module RedmineRate
+  module Hooks
+    class PluginTimesheetViewsTimesheetsTimeEntryRowClassHook < Redmine::Hook::ViewListener
+      def plugin_timesheet_views_timesheets_time_entry_row_class(context={})
+        return ''
+      end
+    end
+  end
+end
diff --git a/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook_test.rb b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook_test.rb
new file mode 100644
index 0000000..30d51f6
--- /dev/null
+++ b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_group_header_hook_test.rb
@@ -0,0 +1,26 @@
+require File.dirname(__FILE__) + '/../../../../test_helper'
+
+class RedmineRate::Hooks::PluginTimesheetViewsTimesheetGroupHeaderTest < ActionController::TestCase
+  include Redmine::Hook::Helper
+
+  def controller
+    @controller ||= ApplicationController.new
+    @controller.response ||= ActionController::TestResponse.new
+    @controller
+  end
+
+  def request
+    @request ||= ActionController::TestRequest.new
+  end
+  
+  def hook(args={})
+    call_hook :plugin_timesheet_views_timesheet_group_header, args
+  end
+
+  context "#plugin_timesheet_views_timesheet_group_header" do
+    should "return an empty string" do
+      @response.body = hook
+      assert @response.body.blank?
+    end
+  end
+end
diff --git a/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook_test.rb b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook_test.rb
new file mode 100644
index 0000000..3dcfb94
--- /dev/null
+++ b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_hook_test.rb
@@ -0,0 +1,26 @@
+require File.dirname(__FILE__) + '/../../../../test_helper'
+
+class RedmineRate::Hooks::PluginTimesheetViewsTimesheetTimeEntryTest < ActionController::TestCase
+  include Redmine::Hook::Helper
+
+  def controller
+    @controller ||= ApplicationController.new
+    @controller.response ||= ActionController::TestResponse.new
+    @controller
+  end
+
+  def request
+    @request ||= ActionController::TestRequest.new
+  end
+  
+  def hook(args={})
+    call_hook :plugin_timesheet_views_timesheet_time_entry, args
+  end
+
+  context "#plugin_timesheet_views_timesheet_time_entry" do
+    should "return an empty string" do
+      @response.body = hook
+      assert @response.body.blank?
+    end
+  end
+end
diff --git a/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook_test.rb b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook_test.rb
new file mode 100644
index 0000000..7b714ae
--- /dev/null
+++ b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheet_time_entry_sum_hook_test.rb
@@ -0,0 +1,26 @@
+require File.dirname(__FILE__) + '/../../../../test_helper'
+
+class RedmineRate::Hooks::PluginTimesheetViewsTimesheetTimeEntrySumTest < ActionController::TestCase
+  include Redmine::Hook::Helper
+
+  def controller
+    @controller ||= ApplicationController.new
+    @controller.response ||= ActionController::TestResponse.new
+    @controller
+  end
+
+  def request
+    @request ||= ActionController::TestRequest.new
+  end
+  
+  def hook(args={})
+    call_hook :plugin_timesheet_views_timesheet_time_entry_sum, args
+  end
+
+  context "#plugin_timesheet_views_timesheet_time_entry_sum" do
+    should "return an empty string" do
+      @response.body = hook
+      assert @response.body.blank?
+    end
+  end
+end
diff --git a/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook_test.rb b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook_test.rb
new file mode 100644
index 0000000..57c5ac6
--- /dev/null
+++ b/test/unit/lib/redmine_rate/hooks/plugin_timesheet_views_timesheets_time_entry_row_class_hook_test.rb
@@ -0,0 +1,26 @@
+require File.dirname(__FILE__) + '/../../../../test_helper'
+
+class RedmineRate::Hooks::PluginTimesheetViewsTimesheetsTimeEntryRowClassTest < ActionController::TestCase
+  include Redmine::Hook::Helper
+
+  def controller
+    @controller ||= ApplicationController.new
+    @controller.response ||= ActionController::TestResponse.new
+    @controller
+  end
+
+  def request
+    @request ||= ActionController::TestRequest.new
+  end
+  
+  def hook(args={})
+    call_hook :plugin_timesheet_views_timesheets_time_entry_row_class, args
+  end
+
+  context "#plugin_timesheet_views_timesheets_time_entry_row_class" do
+    should "return an empty string" do
+      @response.body = hook
+      assert @response.body.blank?
+    end
+  end
+end