begin typechecker + rename

src/main/java/typechecker/TypeChecker.java

@@ -0,0 +1,13 @@
+package typechecker;
+
+import parser.ast.AST;
+
+public final class TypeChecker {
+
+    private TypeChecker() {}
+
+    // Wirft exception bei typeerror, returned nix
+    public static void validate(AST tree) {
+        SymbolTable table = SymbolTable.fromAST(tree);
+    }
+}

src/main/java/typechecker/Typechecker.java

@@ -1,4 +0,0 @@
-package typechecker;
-
-public class Typechecker {
-}