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
}
		}
		public void dialogFieldChanged(DialogField field) {
			validateSettings(field);
		}	
	}
		
	private ListDialogField fNameConventionList;
	private SelectionButtonDialogField fUseKeywordThisBox;
	private SelectionButtonDialogField fUseIsForBooleanGettersBox;
	private static final String PREF_KEYWORD_THIS= PreferenceConstants.CODEGEN_KEYWORD_THIS;
	private static final String PREF_IS_FOR_GETTERS= PreferenceConstants.CODEGEN_IS_FOR_GETTERS;
	private static final String PREF_EXCEPTION_NAME= PreferenceConstants.CODEGEN_EXCEPTION_VAR_NAME;
	
	private StringDialogField fExceptionName;
	
	public NameConventionConfigurationBlock(IStatusChangeListener context, IJavaProject project) {
		super(context, project);
		
		NameConventionAdapter adapter=  new NameConventionAdapter();
		String[] buttons= new String[] {
			 PreferencesMessages.getString("NameConventionConfigurationBlock.list.edit.button") 
		};
		fNameConventionList= new ListDialogField(adapter, buttons, new NameConventionLabelProvider());
		fNameConventionList.setDialogFieldListener(adapter);
		fNameConventionList.setLabelText(PreferencesMessages.getString("NameConventionConfigurationBlock.list.label")); 
		
		String[] columnsHeaders= new String[] {
			PreferencesMessages.getString("NameConventionConfigurationBlock.list.name.column"), 
			PreferencesMessages.getString("NameConventionConfigurationBlock.list.prefix.column"),