@yegor256 I need your advice. Please, take a look, I have 5 variables: two of them are fields names(id and organization), identifier value, original organization value and patched organization value. I tried to do something similar to com.jcabi.github.RtGistCommentTest#patchAndCheckJsonGistComment(there are composite variables names are used). 
Now I have done the following changes: I made field variables with prefix "n"(name) like nidentifier and patched organization value with prefix "p"(patched): porganization, but I'm not sure that this code became more readable. I thought about constants of fields' names... but creation of constants that used in one only method is bad practice too(according to our rules).
I'm sorry, but could you give me advice how I should do it.