clazz = element.createExecutableExtension( attributeName );
if ( element.getAttribute( attributeName ) != null ) { clazz = element.createExecutableExtension( attributeName ); }
	private Object loadClass( IConfigurationElement element,			String attributeName )	{		Object clazz = null;		try		{			clazz = element.createExecutableExtension( attributeName );		}		catch ( CoreException e )		{			ExceptionHandler.handle( e );		}		return clazz;	}