diff --git a/src/main/java/com/alibaba/druid/sql/ast/SQLObjectImpl.java b/src/main/java/com/alibaba/druid/sql/ast/SQLObjectImpl.java
index 9ead39483c..258dee05cd 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/SQLObjectImpl.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/SQLObjectImpl.java
@@ -48,8 +48,9 @@ public abstract class SQLObjectImpl implements SQLObject, Serializable {
     protected abstract void accept0(SQLASTVisitor visitor);
 
     protected final void acceptChild(SQLASTVisitor visitor, List<? extends SQLObject> children) {
-        for (SQLObject child : children)
+        for (SQLObject child : children) {
             acceptChild(visitor, child);
+        }
     }
 
     protected final void acceptChild(SQLASTVisitor visitor, SQLObject child) {
diff --git a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
index 83bdbb4ea4..658f336a38 100644
--- a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
@@ -187,8 +187,9 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter {
     }
 
     public void printIndent() {
-        for (int i = 0; i < this.indentCount; ++i)
+        for (int i = 0; i < this.indentCount; ++i) {
             print(this.indent);
+        }
     }
 
     public void println() {