rails generator template errors

I am trying to write custom generators for my rails projects. I would like to know if there is a way to change the interpreter for a specific file.

My controller template goes in lib/templates/rails/scaffold_controller/controller.rb however the file is actually an ERB file so the IDE shows a bunch of errors and the highlighting is all incorrect. I can probably figure out a way to override the rails generator to go off of an ERB file like controller.rb.erb but I would like to know if RubyMIne supports the default way of making custom generators. (Possibly by allowing an .rb file to be interpreted as a .rb.erb)

The following is the code in the controller.rb file:

<% if namespaced? -%>
require_dependency "<%= namespaced_path %>/application_controller"

<% end -%>
<% module_namespacing do -%>
class <%= controller_class_name %>Controller < ApplicationController
  before_action :set_<%= singular_table_name %>, only: [:show, :edit, :update, :destroy]

  # GET <%= route_url %>
  def index
    @<%= plural_table_name %> = <%= orm_class.all(class_name) %>
  end

  # GET <%= route_url %>/1
  def show
  end

  # GET <%= route_url %>/new
  def new
    @<%= singular_table_name %> = <%= orm_class.build(class_name) %>
  end

  # GET <%= route_url %>/1/edit
  def edit
  end

  # POST <%= route_url %>
  def create
    @<%= singular_table_name %> = <%= orm_class.build(class_name, "#{singular_table_name}_params") %>

    if @<%= orm_instance.save %>
      redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully created.'" %>
    else
      render :new
    end
  end

  # PATCH/PUT <%= route_url %>/1
  def update
    if @<%= orm_instance.update("#{singular_table_name}_params") %>
      redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully updated.'" %>
    else
      render :edit
    end
  end

  # DELETE <%= route_url %>/1
  def destroy
    @<%= orm_instance.destroy %>
    redirect_to <%= index_helper %>_url, notice: <%= "'#{human_name} was successfully destroyed.'" %>
  end

  private
  # Use callbacks to share common setup or constraints between actions.
  def set_<%= singular_table_name %>
    @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
  end

  # Only allow a trusted parameter "white list" through.
  def <%= "#{singular_table_name}_params" %>
  <%- if attributes_names.empty? -%>
        params[:<%= singular_table_name %>]
  <%- else -%>
    params.require(:<%= singular_table_name %>).permit(<%= attributes_names.map { |name| ":#{name}" }.join(', ') %>)
  <%- end -%>
  end
end
<% end -%>