Improve interfaces and fix more linter errors

database/storage/hashmap/map_test.go

@@ -2,15 +2,22 @@
 package hashmap
 
 import (
-	"context"
 	"reflect"
 	"sync"
 	"testing"
 
+	"github.com/safing/portbase/database/storage"
+
 	"github.com/safing/portbase/database/query"
 	"github.com/safing/portbase/database/record"
 )
 
+var (
+	// Compile time interface checks.
+	_ storage.Interface = &HashMap{}
+	_ storage.Batcher   = &HashMap{}
+)
+
 type TestRecord struct {
 	record.Base
 	sync.Mutex
@@ -130,16 +137,6 @@ func TestHashMap(t *testing.T) {
 		t.Fatal("should fail")
 	}
 
-	// maintenance
-	err = db.Maintain(context.TODO())
-	if err != nil {
-		t.Fatal(err)
-	}
-	err = db.MaintainThorough(context.TODO())
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// shutdown
 	err = db.Shutdown()
 	if err != nil {