Set the comment to empty string

diff --git a/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/Command.java b/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/Command.java
index bdbdd5e..cc90040 100644
--- a/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/Command.java
+++ b/bundles/org.eclipse.team.cvs.core/src/org/eclipse/team/internal/ccvs/core/client/Command.java

@@ -627,6 +627,9 @@
 	 * Valid for: add commit import
 	 */
 	public static LocalOption makeArgumentOption(LocalOption option, String argument) {
+		if(argument == null) {
+			argument = "";
+		}
 		return new LocalOption(option.getOption(), argument);  //$NON-NLS-1$
 	}
 	

diff --git a/tests/org.eclipse.team.tests.cvs.core/src/org/eclipse/team/tests/ccvs/core/subscriber/AllTestsTeamSubscriber.java b/tests/org.eclipse.team.tests.cvs.core/src/org/eclipse/team/tests/ccvs/core/subscriber/AllTestsTeamSubscriber.java
new file mode 100644
index 0000000..d84295e
--- /dev/null
+++ b/tests/org.eclipse.team.tests.cvs.core/src/org/eclipse/team/tests/ccvs/core/subscriber/AllTestsTeamSubscriber.java

@@ -0,0 +1,33 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.team.tests.ccvs.core.subscriber;
+import junit.framework.Test;
+import junit.framework.TestSuite;
+import org.eclipse.team.tests.ccvs.core.CVSTestSetup;
+import org.eclipse.team.tests.ccvs.core.EclipseTest;
+
+public class AllTestsTeamSubscriber extends EclipseTest {
+
+	public AllTestsTeamSubscriber() {
+		super();
+	}
+
+	public AllTestsTeamSubscriber(String name) {
+		super(name);
+	}
+
+	public static Test suite() {
+		TestSuite suite = new TestSuite();
+		suite.addTest(CVSMergeSubscriberTest.suite());
+		suite.addTest(CVSWorkspaceSubscriberTest.suite());
+		return new CVSTestSetup(suite);
+	}
+}