Program: 20635
Project: 20635
Buggy source:
@Override public String getResolvedEntity(String publicId,String systemId){
  getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId));
  final String superResolvedEntity=super.getResolvedEntity(publicId,systemId);
  getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId,superResolvedEntity));
  if (superResolvedEntity != null) {
    systemId=superResolvedEntity;
  }
  try {
    final URI uri=new URI(systemId);
    if (URI_SCHEME_MAVEN.equals(uri.getScheme())) {
      getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId));
      final String schemeSpecificPart=uri.getSchemeSpecificPart();
      try {
        final DependencyResource dependencyResource=DependencyResource.valueOf(schemeSpecificPart);
        try {
          final URL url=dependencyResourceResolver.resolveDependencyResource(dependencyResource);
          String resolved=url.toString();
          getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId,resolved));
          return resolved;
        }
 catch (        Exception ex) {
          getLog().error(MessageFormat.format("String_Node_Str",dependencyResource));
        }
      }
 catch (      IllegalArgumentException iaex) {
        getLog().error(MessageFormat.format("String_Node_Str",schemeSpecificPart));
      }
      getLog().error(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
      return superResolvedEntity;
    }
 else {
      getLog().debug(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
      return superResolvedEntity;
    }
  }
 catch (  URISyntaxException urisex) {
    getLog().debug(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
    return superResolvedEntity;
  }
}

Fixed version (ground truth):
@Override public String getResolvedEntity(String publicId,String systemId){
  getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId));
  final String superResolvedEntity=super.getResolvedEntity(publicId,systemId);
  getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId,superResolvedEntity));
  if (superResolvedEntity != null) {
    systemId=superResolvedEntity;
  }
  if (systemId == null) {
    return null;
  }
  try {
    final URI uri=new URI(systemId);
    if (URI_SCHEME_MAVEN.equals(uri.getScheme())) {
      getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId));
      final String schemeSpecificPart=uri.getSchemeSpecificPart();
      try {
        final DependencyResource dependencyResource=DependencyResource.valueOf(schemeSpecificPart);
        try {
          final URL url=dependencyResourceResolver.resolveDependencyResource(dependencyResource);
          String resolved=url.toString();
          getLog().debug(MessageFormat.format("String_Node_Str",publicId,systemId,resolved));
          return resolved;
        }
 catch (        Exception ex) {
          getLog().error(MessageFormat.format("String_Node_Str",dependencyResource));
        }
      }
 catch (      IllegalArgumentException iaex) {
        getLog().error(MessageFormat.format("String_Node_Str",schemeSpecificPart));
      }
      getLog().error(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
      return superResolvedEntity;
    }
 else {
      getLog().debug(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
      return superResolvedEntity;
    }
  }
 catch (  URISyntaxException urisex) {
    getLog().debug(MessageFormat.format("String_Node_Str" + "String_Node_Str",publicId,systemId,superResolvedEntity));
    return superResolvedEntity;
  }
}