diff --git a/controller.go b/controller.go
index 548fb8c..2d8362d 100644
--- a/controller.go
+++ b/controller.go
@@ -25,3 +25,29 @@ func (dm *DataModel) NewProtocol(name string) {
 func (dm *DataModel) SaveNewProtocol(editorContent ProtocolEditor) {
 
 }
+
+func (dm *DataModel) GetPackageEditor() *PackageEditor {
+
+	return nil
+}
+
+func (dm *DataModel) SwitchToProtocolEditor() {
+
+}
+
+func (dm *DataModel) SyncPackageEditor(pkgedt *PackageEditor) {
+
+}
+
+func (dm *DataModel) GetPackageBytes() []byte {
+
+	return []byte{}
+}
+
+func (dm *DataModel) FromSaved(path string) {
+
+}
+
+func (dm *DataModel) SaveAsPcap(path string) {
+
+}
diff --git a/packageeditor.go b/packageeditor.go
new file mode 100644
index 0000000..83b5e6e
--- /dev/null
+++ b/packageeditor.go
@@ -0,0 +1,7 @@
+package npc
+
+import "fyne.io/fyne/v2"
+
+type PackageEditor struct {
+	Representation *fyne.Container
+}
diff --git a/structure.go b/structure.go
index bec90eb..88b2803 100644
--- a/structure.go
+++ b/structure.go
@@ -39,7 +39,8 @@ type DOPMetadata struct {
 }
 
 type DataModel struct {
-	Name      string              // User defined name of his current work (filename later)
-	Protocols []ProtocolStructure // List of protocols in order of the stack
-	Data      []FieldValue        // Data of the fields of all protocols
+	Name             string              // User defined name of his current work (filename later)
+	Protocols        []ProtocolStructure // List of protocols in order of the stack
+	Data             []FieldValue        // Data of the fields of all protocols
+	ProtocolCreation bool
 }