com.puppycrawl.tools.checkstyle.api
Interfaces 
AuditListener
Configurable
Configuration
Context
Contextualizable
FileSetCheck
Filter
MessageDispatcher
TextBlock
Classes 
AbstractFileSetCheck
AbstractLoader
AbstractViolationReporter
AnnotationUtility
AuditEvent
AutomaticBean
Check
DetailAST
FastStack
FileContents
FilterSet
FullIdent
LocalizedMessage
LocalizedMessages
ScopeUtils
SeverityLevelCounter
TokenTypes
Utils
Enums 
JavadocTagInfo
JavadocTagInfo.Type
Scope
SeverityLevel
Exceptions 
CheckstyleException