begin implementation of stups grammar

src/test/resources/exampleGrammars/Grammar.grammar

@@ -0,0 +1,32 @@
+START: S
+EPS: epsilon
+
+// Structures:
+NTERM: S CLASS_CNT BLOCK_CNT
+NTERM: DECLARATION DECLARE_INT DECLARE_STRING DECLARE_BOOLEAN
+
+// Token:
+TERM: PUBLIC STATIC CLASS IDENTIFIER IDENTIFIER_MAIN
+TERM: L_BRACE R_BRACE L_BRACKET R_BRACKET L_PAREN R_PAREN
+TERM: STRING_TYPE INTEGER_TYPE BOOLEAN_TYPE VOID_TYPE
+TERM: SEMICOLON
+
+// -------------------------------------------------------------------------------------------------
+
+// class IDENTIFIER { CLASS_CNT }
+S -> CLASS IDENTIFIER L_BRACE CLASS_CNT R_BRACE
+
+// public static void main(String[] args) { BLOCK_CNT }
+CLASS_CNT -> PUBLIC STATIC VOID_TYPE IDENTIFIER_MAIN L_PAREN STRING_TYPE L_BRACKET R_BRACKET IDENTIFIER R_PAREN L_BRACE BLOCK_CNT R_BRACE
+
+BLOCK_CNT -> DECLARATION | EPS
+
+// Declaration: TYPE IDENTIFIER = LITERAL;
+DECLARATION -> DECLARE_INT | DECLARE_STRING | DECLARE_BOOLEAN
+DECLARE_INT -> INTEGER_TYPE IDENTIFIER ASSIGN INTEGER_LIT SEMICOLON
+DECLARE_STRING -> STRING_TYPE IDENTIFIER ASSIGN STRING_LIT SEMICOLON
+DECLARE_BOOLEAN -> BOOLEAN_TYPE IDENTIFIER ASSIGN BOOLEAN_LIT SEMICOLON
+
+// Predicate
+
+// Operation