diff --git a/core/src/main/java/jef/query/QueryBuilder.java b/core/src/main/java/jef/platform/base/query/QueryBuilder.java
similarity index 99%
rename from core/src/main/java/jef/query/QueryBuilder.java
rename to core/src/main/java/jef/platform/base/query/QueryBuilder.java
index b62febe..6ff7546 100644
--- a/core/src/main/java/jef/query/QueryBuilder.java
+++ b/core/src/main/java/jef/platform/base/query/QueryBuilder.java
@@ -1,4 +1,4 @@
-package jef.query;
+package jef.platform.base.query;
 
 import jef.expressions.AndExpression;
 import jef.expressions.BinaryExpression;
diff --git a/core/src/main/java/jef/query/MysqlQueryBuilder.java b/core/src/main/java/jef/query/MysqlQueryBuilder.java
deleted file mode 100644
index 855512f..0000000
--- a/core/src/main/java/jef/query/MysqlQueryBuilder.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package jef.query;
-
-public class MysqlQueryBuilder extends QueryBuilder {
-
-}
diff --git a/mysql/src/main/java/jef/platform/mysql/query/MysqlQueryBuilder.java b/mysql/src/main/java/jef/platform/mysql/query/MysqlQueryBuilder.java
new file mode 100644
index 0000000..fa13071
--- /dev/null
+++ b/mysql/src/main/java/jef/platform/mysql/query/MysqlQueryBuilder.java
@@ -0,0 +1,7 @@
+package jef.platform.mysql.query;
+
+import jef.platform.base.query.QueryBuilder;
+
+public class MysqlQueryBuilder extends QueryBuilder {
+
+}