| Severity | 
Category | 
Rule | 
Message | 
Line | 
  Warning | 
javadoc | 
JavadocPackage | 
Missing package-info.java file. | 
 | 
  Error | 
javadoc | 
JavadocType | 
Missing a Javadoc comment. | 
27 | 
  Error | 
javadoc | 
JavadocVariable | 
Missing a Javadoc comment. | 
29 | 
  Warning | 
naming | 
MemberName | 
Name '_tracker' must match pattern '^[a-z][a-zA-Z0-9]*$'. | 
29 | 
  Error | 
design | 
DesignForExtension | 
Method 'start' is not designed for extension - needs to be abstract, final or empty. | 
31 | 
  Error | 
javadoc | 
JavadocMethod | 
Missing a Javadoc comment. | 
31 | 
  Error | 
design | 
DesignForExtension | 
Method 'stop' is not designed for extension - needs to be abstract, final or empty. | 
51 | 
  Error | 
javadoc | 
JavadocMethod | 
Missing a Javadoc comment. | 
51 | 
  Error | 
javadoc | 
JavadocMethod | 
Missing a Javadoc comment. | 
55 |