Name Generator Inspection

one)

cmdArguments.getGender().substring(0, 1).toLowerCase().equals("m") //жуть cmdArguments.getGender() == Genders.MALE //старые добрые enum 

but in getGender you need to write something like this

 switch(gender) { case "male": return Gender.MALE; //и т.п. 

2)

  Random randomizer = new Random(System.nanoTime()); //мелкая придирка, но System.nanoTime() писать не обязательно 

3) in

 for (int i = 0; i < cmdArguments.getCount(); i++) { System.out.println(engine.generateName(cmdArguments.getLength())); } 

System.out.println is better to put in a separate method, and better in a separate class (rule mvc)

four)

 catch (FileNotFoundException e) { System.out.println(e); } catch (IOException e) { System.out.println(e); } 

change to

 catch (Exception e) { System.err.println(e); //обратите внимание на err } 

five)

 readData("male_names.txt"); 

here, too, it would be good to use enum. What if in the future you will not read data from a file, but from the Internet? Will url each time specify?

6) a huge amount

 s.substring(i, i + 2); 

And why +2, not +3? A small comment would not hurt

7) A separate text explanation of how the algorithm works. Otherwise, it will be clear only to you.

0) But most importantly, after my recommendations not to turn into Boris from a famous article. How two programmers were baking bread