diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index e4318dc2..6a9bc960 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -601,11 +601,11 @@ configureEditors: function () {
                 } else {
                     // working time is less than 75 percentile
                     // ensure we give user at least 10 minutes before we bother the user
-                    var timeUntilAskQuestion = (percentile75 - accumulatedWorkTimeUser) > minTimeUntilAskQuestion ? (percentile75 - accumulatedWorkTimeUser) : minTimeUntilAskQuestion;
+                    var timeUntilAskForRFC = (percentile75 - accumulatedWorkTimeUser) > minTimeUntilAskQuestion ? (percentile75 - accumulatedWorkTimeUser) : minTimeUntilAskQuestion;
                 }
 
                 // if notifications are too close to each other, ensure some time differences between them
-                if (Math.abs(timeUntilAskQuestion - timeUntilBreak) < 5 * 1000 * 60){
+                if (Math.abs(timeUntilAskForRFC - timeUntilBreak) < 5 * 1000 * 60){
                     timeUntilBreak = timeUntilBreak * 2;
                 }
 
@@ -634,7 +634,7 @@ configureEditors: function () {
                             type: 'POST',
                             url: $('#editor').data('intervention-save-url')});
                     };
-                }, timeUntilAskQuestion);
+                }, timeUntilAskForRFC);
             }
         });
     },
@@ -642,7 +642,8 @@ configureEditors: function () {
     initializeSearchButton: function(){
         $('#btn-search-col').button().click(function(){
             var search = $('#search-col').val();
-            window.open(`https://open.hpi.de/courses/javaeinstieg2017/pinboard?query=${search}`, '_blank');
+            var course_token = $('#sidebar-collapsed').data('course_token')
+            window.open(`https://open.hpi.de/courses/${course_token}/pinboard?query=${search}`, '_blank');
         })
 
         $('#sidebar-search-collapsed').on('click',this.handleSideBarToggle.bind(this));
diff --git a/app/controllers/concerns/lti.rb b/app/controllers/concerns/lti.rb
index ce2105bd..7483327d 100644
--- a/app/controllers/concerns/lti.rb
+++ b/app/controllers/concerns/lti.rb
@@ -140,6 +140,7 @@ module Lti
 
     lti_parameters.lti_parameters = options[:parameters].slice(*SESSION_PARAMETERS).to_json
     lti_parameters.save!
+    @lti_parameters = lti_parameters
 
     session[:consumer_id] = options[:consumer].id
     session[:external_user_id] = @current_user.id
diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 3742de4d..87059bf8 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -9,6 +9,7 @@ class ExercisesController < ApplicationController
   before_action :set_exercise, only: MEMBER_ACTIONS + [:clone, :implement, :working_times, :intervention, :run, :statistics, :submit, :reload]
   before_action :set_external_user, only: [:statistics]
   before_action :set_file_types, only: [:create, :edit, :new, :update]
+  before_action :set_course_token, only: [:implement]
 
   skip_before_filter :verify_authenticity_token, only: [:import_proforma_xml]
   skip_after_action :verify_authorized, only: [:import_proforma_xml]
@@ -155,12 +156,16 @@ class ExercisesController < ApplicationController
 
   def implement
     redirect_to(@exercise, alert: t('exercises.implement.no_files')) unless @exercise.files.visible.exists?
+    user_got_enough_interventions = UserExerciseIntervention.where(exercise: @exercise, user: current_user).count >= 3
+    is_java_course = @course_token && @course_token.eql?(java_course_token)
+
     @show_interventions =
-      if UserExerciseIntervention.where(exercise: @exercise, user: current_user).count >= 3
+      if !is_java_course || user_got_enough_interventions
         "false"
       else
         "true"
       end
+
     @search = Search.new
     @search.exercise = @exercise
     @submission = current_user.submissions.where(exercise_id: @exercise.id).order('created_at DESC').first
@@ -174,6 +179,22 @@ class ExercisesController < ApplicationController
     end
   end
 
+  def set_course_token
+    if @lti_parameters
+      lti_json = @lti_parameters.lti_parameters
+      @course_token =
+          if match = lti_json.match(/^.*courses\/([a-z0-9\-]+)\/sections/)
+            match.captures.first
+          else
+            java_course_token
+          end
+    else
+      # no consumer, therefore implementation with internal user
+      @course_token = java_course_token
+    end
+  end
+  private :set_course_token
+
   def working_times
     working_time_accumulated = @exercise.accumulated_working_time_for_only(current_user)
     working_time_75_percentile = @exercise.get_quantiles([0.75]).first
@@ -358,4 +379,8 @@ class ExercisesController < ApplicationController
     redirect_to_lti_return_path
   end
 
+  def java_course_token
+    "702cbd2a-c84c-4b37-923a-692d7d1532d0"
+  end
+
 end
diff --git a/app/views/exercises/_editor_file_tree.html.slim b/app/views/exercises/_editor_file_tree.html.slim
index 9021e54a..6a90b60d 100644
--- a/app/views/exercises/_editor_file_tree.html.slim
+++ b/app/views/exercises/_editor_file_tree.html.slim
@@ -1,4 +1,4 @@
-div id='sidebar-collapsed' class=(@exercise.hide_file_tree ? '' : 'hidden')
+div id='sidebar-collapsed' class=(@exercise.hide_file_tree ? '' : 'hidden') data-course_token=@course_token
   = render('editor_button', classes: 'btn-block btn-primary btn-sm', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa fa-plus-square', id: 'sidebar-collapse-collapsed', label:'', title:t('exercises.editor.expand_action_sidebar'))
 
   - if @exercise.allow_file_creation and not @exercise.hide_file_tree?
@@ -6,7 +6,8 @@ div id='sidebar-collapsed' class=(@exercise.hide_file_tree ? '' : 'hidden')
 
   = render('editor_button', classes: 'btn-block btn-primary btn-sm enforce-top-margin', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa fa-download', id: 'download-collapsed', label:'', title: t('exercises.editor.download'))
   = render('editor_button', classes: 'btn-block btn-primary btn-sm enforce-top-margin', data: {:'data-message-confirm' => t('exercises.editor.confirm_start_over'), :'data-url' => reload_exercise_path(@exercise), :'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa fa-history', id: 'start-over-collapsed', label:'', title: t('exercises.editor.start_over'))
-  = render('editor_button', classes: 'btn-block btn-primary btn-sm enforce-top-margin', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa fa-search', id: 'sidebar-search-collapsed', label: '', title: t('search.search_in_forum'))
+  - if @course_token
+    = render('editor_button', classes: 'btn-block btn-primary btn-sm enforce-top-margin', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa fa-search', id: 'sidebar-search-collapsed', label: '', title: t('search.search_in_forum'))
 
 div id='sidebar-uncollapsed' class=(@exercise.hide_file_tree ? 'hidden' : '')
   = render('editor_button', classes: 'btn-block btn-primary btn-sm', icon: 'fa fa-minus-square', id: 'sidebar-collapse', label: t('exercises.editor.collapse_action_sidebar'))
@@ -25,14 +26,15 @@ div id='sidebar-uncollapsed' class=(@exercise.hide_file_tree ? 'hidden' : '')
   = render('editor_button', classes: 'btn-block btn-primary btn-sm enforce-top-margin', icon: 'fa fa-download', id: 'download', label: t('exercises.editor.download'))
   = render('editor_button', classes: 'btn-block btn-primary btn-sm', data: {:'data-message-confirm' => t('exercises.editor.confirm_start_over'), :'data-url' => reload_exercise_path(@exercise)}, icon: 'fa fa-history', id: 'start-over', label: t('exercises.editor.start_over'))
 
-  = form_for(@search, multipart: true, target: "_blank") do |f|
-    .input-group.enforce-top-margin
-      = f.hidden_field :exercise_id
-      .enforce-right-margin
-        = f.text_field(:search, class: 'form-control', id: "search-col", required: true, placeholder: t('search.search_in_forum'))
-      .input-group-btn
-        = button_tag(class: 'btn btn-primary', id: 'btn-search-col', model: @search.class.model_name.human) do
-          i.fa.fa-search
+  - if @course_token
+    = form_for(@search, multipart: true, target: "_blank") do |f|
+      .input-group.enforce-top-margin
+        = f.hidden_field :exercise_id
+        .enforce-right-margin
+          = f.text_field(:search, class: 'form-control', id: "search-col", required: true, placeholder: t('search.search_in_forum'))
+        .input-group-btn
+          = button_tag(class: 'btn btn-primary', id: 'btn-search-col', model: @search.class.model_name.human) do
+            i.fa.fa-search
 
 
 - if @exercise.allow_file_creation?