Bug 55399 exception on Code Style preference page
Nightly build 0319 - start a new eclipse install - show the Java > Code Style preference page - will get the attached exception
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/NameConventionConfigurationBlock.java
fUseKeywordThisBox.doFillIntoGrid(composite, 3);
		fUseIsForBooleanGettersBox.doFillIntoGrid(composite, 3);
		fExceptionName.doFillIntoGrid(composite, 2);
		DialogField.createEmptySpace(composite);
		
		return composite;
	}
	
	protected void validateSettings(DialogField field) {
		if (field == fExceptionName) {
			String name= fExceptionName.getText();
			IStatus status = JavaConventions.validateIdentifier(name);
			if (!status.isOK()) {
				fContext.statusChanged(status);
			} else {
				fContext.statusChanged(new StatusInfo());
			}
		}
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock#validateSettings(java.lang.String, java.lang.String)
	 */
	protected void validateSettings(String changedKey, String newValue) {
		
	}	
	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.ui.preferences.OptionsConfigurationBlock#updateControls()
	 */