diff --git a/alib2data/src/alphabet/SymbolException.cpp b/alib2data/src/alphabet/SymbolException.cpp
deleted file mode 100644
index fd4c910504d25dd1ed5cdea865ebf8971539a476..0000000000000000000000000000000000000000
--- a/alib2data/src/alphabet/SymbolException.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * SymbolException.cpp
- *
- *  Created on: Apr 13, 2016
- *      Author: Jan Trvnicek
- */
-
-#include "SymbolException.h"
-
-namespace alphabet {
-
-SymbolException::SymbolException(const std::string& cause) :
-		CommonException(cause) {
-}
-
-} /* namespace alphabet */
diff --git a/alib2data/src/alphabet/SymbolException.h b/alib2data/src/alphabet/SymbolException.h
deleted file mode 100644
index c05da7a7b32a207e1024170a4e5603e4521dcd12..0000000000000000000000000000000000000000
--- a/alib2data/src/alphabet/SymbolException.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * SymbolException.h
- *
- *  Created on: Apr 13, 2016
- *      Author: Jan Trvnicek
- */
-
-#ifndef SYMBOL_EXCEPTION_H_
-#define SYMBOL_EXCEPTION_H_
-
-#include <exception/CommonException.h>
-
-namespace alphabet {
-
-/**
- * Exception thrown by an tree, tree parser or tree printer.
- */
-class SymbolException: public exception::CommonException {
-public:
-	explicit SymbolException(const std::string& cause);
-};
-
-} /* namespace alphabet */
-
-#endif /* SYMBOL_EXCEPTION_H_ */