--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pkg/common/errors.go	Mon Nov 19 17:14:42 2018 +0100
@@ -0,0 +1,31 @@
+// This is Free Software under GNU Affero General Public License v >= 3.0
+// without warranty, see README.md and license for details.
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// License-Filename: LICENSES/AGPL-3.0.txt
+//
+// Copyright (C) 2018 by via donau
+//   – Österreichische Wasserstraßen-Gesellschaft mbH
+// Software engineering by Intevation GmbH
+//
+// Author(s):
+//  * Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+package common
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+func ToError(errs []error) error {
+	var b strings.Builder
+	for i, err := range errs {
+		if i > 0 {
+			fmt.Fprintf(&b, ", ")
+		}
+		fmt.Fprintf(&b, "%v", err)
+	}
+	return errors.New(b.String())
+}