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diff --git a/src/core/src/data/io/AbstractMVDataReader.java b/src/core/src/data/io/AbstractMVDataReader.java
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+++ b/src/core/src/data/io/AbstractMVDataReader.java
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+/*
+ * SSSync, a Simple and Stupid Synchronizer for data with multi-valued attributes
+ * Copyright (C) 2014  Ludovic Pouzenc <ludovic@pouzenc.fr>
+ *  
+ * This file is part of SSSync.
+ *
+ *  SSSync 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.
+ *
+ *  SSSync 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 SSSync.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package data.io;
+
+/**
+ * Stream-oriented abstract reader from a particular data source.
+ * Memory footprint should not depends on readable line count nor next() call count.
+ * 
+ * @author lpouzenc
+ */
+public abstract class AbstractMVDataReader implements MVDataReader {
+
+	protected String dataSourceName="(unknown source)";
+
+	/**
+	 * Not supported (Readers are read-only).
+	 */
+	@Override
+	public void remove() {
+		throw new UnsupportedOperationException();
+	}
+
+	/* (non-Javadoc)
+	 * @see data.io.MVDataReader#getDataSourceName()
+	 */
+	@Override
+	public String getDataSourceName() {
+		return dataSourceName;
+	}
+
+}