diff --git a/app/lint-baseline.xml b/app/lint-baseline.xml
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             file="src/main/java/com/keylesspalace/tusky/BaseActivity.java"
-            line="165"
+            line="207"
             column="42"/>
     </issue>
 
@@ -6885,7 +6753,7 @@
         errorLine2="                                                                                              ~~~~~~~~~~~~~~~~~~~~~~~~">
         <location
             file="src/main/java/com/keylesspalace/tusky/BaseActivity.java"
-            line="165"
+            line="207"
             column="95"/>
     </issue>
 
@@ -6896,7 +6764,7 @@
         errorLine2="                                   ~~~~~~~~">
         <location
             file="src/main/java/com/keylesspalace/tusky/BaseActivity.java"
-            line="233"
+            line="275"
             column="36"/>
     </issue>
 
@@ -6907,7 +6775,7 @@
         errorLine2="                                                         ~~~~~~~~~~~~~~~~~~~">
         <location
             file="src/main/java/com/keylesspalace/tusky/BaseActivity.java"
-            line="233"
+            line="275"
             column="58"/>
     </issue>
 
diff --git a/app/src/main/java/com/keylesspalace/tusky/db/AppDatabase.java b/app/src/main/java/com/keylesspalace/tusky/db/AppDatabase.java
index 86ea7664..a5127354 100644
--- a/app/src/main/java/com/keylesspalace/tusky/db/AppDatabase.java
+++ b/app/src/main/java/com/keylesspalace/tusky/db/AppDatabase.java
@@ -16,6 +16,7 @@
 package com.keylesspalace.tusky.db;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.room.AutoMigration;
 import androidx.room.Database;
 import androidx.room.DeleteColumn;
@@ -50,11 +51,11 @@ import java.io.File;
 )
 public abstract class AppDatabase extends RoomDatabase {
 
-    public abstract AccountDao accountDao();
-    public abstract InstanceDao instanceDao();
-    public abstract ConversationsDao conversationDao();
-    public abstract TimelineDao timelineDao();
-    public abstract DraftDao draftDao();
+    @NonNull public abstract AccountDao accountDao();
+    @NonNull public abstract InstanceDao instanceDao();
+    @NonNull public abstract ConversationsDao conversationDao();
+    @NonNull public abstract TimelineDao timelineDao();
+    @NonNull public abstract DraftDao draftDao();
 
     public static final Migration MIGRATION_2_3 = new Migration(2, 3) {
         @Override
@@ -386,7 +387,7 @@ public abstract class AppDatabase extends RoomDatabase {
 
         private final File oldDraftDirectory;
 
-        public Migration25_26(File oldDraftDirectory) {
+        public Migration25_26(@Nullable File oldDraftDirectory) {
             super(25, 26);
             this.oldDraftDirectory = oldDraftDirectory;
         }