eclipse插件开发，如何给编辑器左边的侧边栏添加错误信息的标识？

point="org.eclipse.ui.editors.markerAnnotationSpecification">
annotationType="com.booway.checkcode.error"
label="ERROR"
icon="icons/checkcode_error.gif"
textPreferenceKey="occurrenceIndication"
textPreferenceValue="true"
highlightPreferenceKey="occurrenceHighlighting"
highlightPreferenceValue="true"
contributesToHeader="true"
overviewRulerPreferenceKey="occurrenceIndicationInOverviewRuler"
overviewRulerPreferenceValue="true"
verticalRulerPreferenceKey="occurrenceIndicationInVerticalRuler"
verticalRulerPreferenceValue="true"
colorPreferenceKey="occurrenceIndicationColor"
colorPreferenceValue="212,212,212"
presentationLayer="4"
showInNextPrevDropdownToolbarActionKey="showOccurrenceInNextPrevDropdownToolbarAction"
showInNextPrevDropdownToolbarAction="true"
isGoToNextNavigationTargetKey="isOccurrenceGoToNextNavigationTarget"
isGoToNextNavigationTarget="false"
isGoToPreviousNavigationTargetKey="isOccurrenceGoToPreviousNavigationTarget"
isGoToPreviousNavigationTarget="false"
textStylePreferenceKey="occurrenceTextStyle"
textStylePreferenceValue="NONE">

用这个扩展点即可!  具体可以参考checkstyle源码