org.apache.avalon.excalibur.logger
インタフェース 
LoggerManager
LogKitManageable
LogKitManager
LogTargetFactory
LogTargetFactoryManageable
LogTargetFactoryManager
LogTargetManager
クラス 
DefaultLogKitManager
DefaultLogTargetFactoryManager
DefaultLogTargetManager
Log4JLoggerManager
LogKitLoggerManager