ignoring build files
diff --git a/java-symbol-solver-model/.gitignore b/java-symbol-solver-model/.gitignore
index a84a49a..fe3bff3 100644
--- a/java-symbol-solver-model/.gitignore
+++ b/java-symbol-solver-model/.gitignore
@@ -13,3 +13,4 @@
 .idea
 *.iml
 target
+build