Fix checkstyle

Author: RanVaknin

test/sdk-benchmarks/src/main/java/software/amazon/awssdk/benchmark/enhanced/dynamodb/JsonConversionBenchmark.java

@@ -15,6 +15,11 @@
 
 package software.amazon.awssdk.benchmark.enhanced.dynamodb;
 
+import com.amazonaws.services.dynamodbv2.document.Item;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.concurrent.TimeUnit;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;
 import org.openjdk.jmh.annotations.Fork;
@@ -27,12 +32,6 @@
 import org.openjdk.jmh.annotations.Warmup;
 import software.amazon.awssdk.enhanced.dynamodb.AttributeConverterProvider;
 import software.amazon.awssdk.enhanced.dynamodb.document.EnhancedDocument;
-import com.amazonaws.services.dynamodbv2.document.Item;
-
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-import java.util.concurrent.TimeUnit;
 
 @BenchmarkMode(Mode.SampleTime)
 @OutputTimeUnit(TimeUnit.MICROSECONDS)