Bug 17256 Exception due to bug 17208
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/UpdateValueStrategy.java
private HashMap validators = new HashMap();
		/**
		 * Adds the system-provided validators to the current validator
		 * registry. This is done automatically for the validator registry
		 * singleton.
		 */
		private ValidatorRegistry() {
			
			associate(String.class, Integer.TYPE,
					new String2IntegerPrimitiveValidator());
			associate(String.class, Byte.TYPE,
					new String2BytePrimitiveValidator());