Why is this an issue?

Under the reasoning that cleaner code is better code, the semicolon at the end of a try-with-resources construct should be omitted because it can be omitted.

Noncompliant code example

try (ByteArrayInputStream b = new ByteArrayInputStream(new byte[10]);  // ignored; this one's required
      Reader r = new InputStreamReader(b);)   // Noncompliant
{
   //do stuff
}

Compliant solution

try (ByteArrayInputStream b = new ByteArrayInputStream(new byte[10]);
      Reader r = new InputStreamReader(b))
{
   //do stuff
}