Description: Keep the Token.EOF_TOKEN field to preserve the backward compatibility

Author: Emmanuel Bourg <ebourg@apache.org>

Forwarded: no

--- a/runtime/Java/src/main/java/org/antlr/runtime/Token.java

+++ b/runtime/Java/src/main/java/org/antlr/runtime/Token.java

@@ -38,6 +38,7 @@

 	public static final int MIN_TOKEN_TYPE = UP+1;

     public static final int EOF = CharStream.EOF;

+    public static final Token EOF_TOKEN = new CommonToken(EOF);

 	public static final int INVALID_TOKEN_TYPE = 0;

 	public static final Token INVALID_TOKEN = new CommonToken(INVALID_TOKEN_TYPE);