Checking core structure...
compile_project:10: no matches found: *.in
rm -f edt-core.jar `find . -name \*.class`
(cd src; javac -encoding UTF-8 `find . -name \*.java`)
./edt/Editor.java:14: error: cannot find symbol
public class Editor extends Document implements Serializable {
                            ^
  symbol: class Document
./edt/Author.java:17: error: cannot find symbol
               return _mail;
                      ^
  symbol:   variable _mail
  location: class Author
./edt/Editor.java:17: error: cannot find symbol
              Document doc = new Document();
              ^
  symbol:   class Document
  location: class Editor
./edt/Editor.java:17: error: cannot find symbol
              Document doc = new Document();
                                 ^
  symbol:   class Document
  location: class Editor
4 errors
Makefile:5: recipe for target 'all' failed
make: *** [all] Error 1