Fix get entreprise 404 not found

app/models/entreprise.rb

@@ -2,4 +2,6 @@ class Entreprise < ActiveRecord::Base
   belongs_to :dossier
   has_one :etablissement, dependent: :destroy
   has_one :rna_information, dependent: :destroy
+
+  validates_presence_of :siren
 end

app/services/dossier_service.rb

@@ -9,6 +9,10 @@ class DossierService
   def dossier_informations!
     @entreprise_adapter = SIADE::EntrepriseAdapter.new(DossierService.siren @siret)
 
+    if @entreprise_adapter.to_params.nil?
+      raise RestClient::ResourceNotFound
+    end
+
     @dossier.create_entreprise(@entreprise_adapter.to_params)
     @etablissement_adapter = SIADE::EtablissementAdapter.new(@siret)