Names of class types should be descriptive nouns or noun phrases, not overly long, in mixed case with the first letter of each word capitalized.
ClassLoader SecurityManager Thread Dictionary BufferedInputStream
Your Data Transfer Object class names should follow the convention mentioned above.
Suffixing a class name with DTO or Dto is not really meaningful and doesn’t tell much about the class itself. Try to give names that describe the purpose of your classes. Here are a few name suggestions you could use:
Note 1: Whether acronyms or all capitalized words should be handled as words or not, I guess it’s up to you. Check the Java API and you will find some stumbles like
GZIPInputStream. Both classes are in the same package and the name convention is not consistent.
HttpURLConnection doesn’t show any consistency with acronyms either.