Added database persistence ability

app/src/main/java/com/denizk0461/studip/viewmodel/EventViewModel.kt

@@ -0,0 +1,13 @@
+package com.denizk0461.studip.viewmodel
+
+import android.app.Application
+import androidx.lifecycle.LiveData
+import com.denizk0461.studip.data.StudIPEvent
+
+class EventViewModel(app: Application) : TemplateViewModel(app) {
+
+    val allEvents: LiveData<List<StudIPEvent>> = repo.allEvents
+
+    fun insertEvent(event: StudIPEvent) { repo.insertEvent(event) }
+    fun nukeEvents() { repo.nukeEvents() }
+}