diff --git a/src/main/java/eu/omp/irap/vespa/epntapclient/votable/Utils.java b/src/main/java/eu/omp/irap/vespa/epntapclient/votable/Utils.java
new file mode 100644
index 0000000..aa7e4a4
--- /dev/null
+++ b/src/main/java/eu/omp/irap/vespa/epntapclient/votable/Utils.java
@@ -0,0 +1,50 @@
+/*
+ * This file is a part of EpnTAPClient.
+ * This program aims to provide EPN-TAP support for software clients, like CASSIS spectrum analyzer.
+ * See draft specifications: https://voparis-confluence.obspm.fr/pages/viewpage.action?pageId=559861
+ * Copyright (C) 2016 Institut de Recherche en Astrophysique et Planétologie.
+ * 
+ * This program is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at your option) any later
+ * version. This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more details. You should have received a copy of
+ * the GNU General Public License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+package eu.omp.irap.vespa.epntapclient.votable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author N. Jourdane
+ */
+public class Utils {
+	public static class StringJoiner {
+		String separator;
+		List<String> list;
+		String string;
+
+		public StringJoiner(String separator) {
+			this.separator = separator;
+			this.list = new ArrayList();
+			string = "";
+		}
+
+		public void add(String text) {
+			if ("".equals(string)) {
+				string = text;
+			} else {
+				string += separator + text;
+			}
+		}
+
+		@Override
+		public String toString() {
+			return string;
+		}
+	}
+}
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