Index: branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/alignment/matrix/UPGMAMatrix.java
===================================================================
--- branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/alignment/matrix/UPGMAMatrix.java	(revision 1735)
+++ branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/alignment/matrix/UPGMAMatrix.java	(revision 1736)
@@ -11,7 +11,12 @@
 
 	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	/**
 	 * Instantiates a new UPGMA matrix.
 	 *
-	 * @param size the size
+	 * @param size the size of the matrix
 	 */
 	public UPGMAMatrix(int size) {