code: @Override
      public void closeMappingFiles() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.entry(tc, "closeMappingFiles", mapFileInputStreams);
          }
          // go through each mapping input stream and close the file.
          for (InputStream inputStream : mapFileInputStreams) {
              try {
                  inputStream.close();
              } catch (Throwable t) {
                  FFDCFilter.processException(t, CLASS_NAME + ".closeMappingFiles", "573");
                  // log the close failed in a debug and keep going.
                  if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                      Tr.debug(tc, "Closing InputStream failed " + inputStream);
                  }
              }
          }
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.exit(tc, "closeMappingFiles", mapFileInputStreams);
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.beanvalidation.config.ValidationConfigurationInterface#closeMappingFiles()