diff --git a/src/main/java/com/loafle/overflow/module/sensorconfig/model/Connection.java b/src/main/java/com/loafle/overflow/module/sensorconfig/model/Connection.java
index 01ce000..0913527 100644
--- a/src/main/java/com/loafle/overflow/module/sensorconfig/model/Connection.java
+++ b/src/main/java/com/loafle/overflow/module/sensorconfig/model/Connection.java
@@ -6,41 +6,40 @@ import com.loafle.overflow.module.core.type.PortType;
  * Connection
  */
 public class Connection {
-	private String ip;
-	private int port;
-	private PortType portType;
-	private boolean ssl;
+  private String ip;
+  private int port;
+  private PortType portType;
+  private boolean ssl;
 
-    public String getIp() {
-        return ip;
-    }
+  public String getIp() {
+    return ip;
+  }
 
-    public void setIp(String ip) {
-        this.ip = ip;
-    }
+  public void setIp(String ip) {
+    this.ip = ip;
+  }
 
-    public int getPort() {
-        return port;
-    }
+  public int getPort() {
+    return port;
+  }
 
-    public void setPort(int port) {
-        this.port = port;
-    }
+  public void setPort(int port) {
+    this.port = port;
+  }
 
-    public PortType getPortType() {
-        return portType;
-    }
+  public PortType getPortType() {
+    return portType;
+  }
 
-    public void setPortType(PortType portType) {
-        this.portType = portType;
-    }
+  public void setPortType(PortType portType) {
+    this.portType = portType;
+  }
 
-    public boolean isSsl() {
-        return ssl;
-    }
+  public boolean isSsl() {
+    return ssl;
+  }
 
-    public void setSsl(boolean ssl) {
-        this.ssl = ssl;
-    }
+  public void setSsl(boolean ssl) {
+    this.ssl = ssl;
+  }
 }
-
diff --git a/src/main/java/com/loafle/overflow/module/sensorconfig/model/Item.java b/src/main/java/com/loafle/overflow/module/sensorconfig/model/Item.java
index 99669c2..d15d184 100644
--- a/src/main/java/com/loafle/overflow/module/sensorconfig/model/Item.java
+++ b/src/main/java/com/loafle/overflow/module/sensorconfig/model/Item.java
@@ -1,9 +1,37 @@
 package com.loafle.overflow.module.sensorconfig.model;
 
+import java.util.List;
+
 /**
  * Item
  */
 public class Item {
+  private List<Keys> keys;
+  private QueryInfo queryInfo;
+  private MappingInfo mappingInfo;
+
+  public List<Keys> getKeys() {
+    return keys;
+  }
+
+  public void setKeys(List<Keys> keys) {
+    this.keys = keys;
+  }
+
+  public QueryInfo getQueryInfo() {
+    return queryInfo;
+  }
+
+  public void setQueryInfo(QueryInfo queryInfo) {
+    this.queryInfo = queryInfo;
+  }
+
+  public MappingInfo getMappingInfo() {
+    return mappingInfo;
+  }
+
+  public void setMappingInfo(MappingInfo mappingInfo) {
+    this.mappingInfo = mappingInfo;
+  }
 
-  
 }
\ No newline at end of file
diff --git a/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSet.java b/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSet.java
index 0913ac0..59ec408 100644
--- a/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSet.java
+++ b/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSet.java
@@ -8,9 +8,9 @@ import java.util.Map;
  * ResultSet
  */
 public abstract class ResultSet {
-  private Item item;
-  private List<List<String>> rows;
-  private Map<String, Integer> meta;
+  protected Item item;
+  protected List<List<String>> rows;
+  protected Map<String, Integer> meta;
 
   // methods
   public static ResultSet newInstance(Item item) {
diff --git a/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSetCol.java b/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSetCol.java
index bace6ad..7e75e01 100644
--- a/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSetCol.java
+++ b/src/main/java/com/loafle/overflow/module/sensorconfig/model/ResultSetCol.java
@@ -1,5 +1,6 @@
 package com.loafle.overflow.module.sensorconfig.model;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -14,7 +15,6 @@ public class ResultSetCol extends ResultSet {
   }
 
   public void setMeta() {
-
     List<Keys> meta = this.item.getKeys();
     List<String> arrayColumns = this.item.getMappingInfo().getArrayColumns();
 
diff --git a/src/main/java/com/loafle/overflow/module/sensorconfig/model/SensorConfig.java b/src/main/java/com/loafle/overflow/module/sensorconfig/model/SensorConfig.java
index 6097393..1e6df66 100644
--- a/src/main/java/com/loafle/overflow/module/sensorconfig/model/SensorConfig.java
+++ b/src/main/java/com/loafle/overflow/module/sensorconfig/model/SensorConfig.java
@@ -6,58 +6,58 @@ import java.util.List;
  * SensorConfig
  */
 public class SensorConfig {
-	private long id;
-	private String configID;
-	private Target   target;
-	private Schedule schedule;
-	private Crawler  crawler;
-	private List<Item> items;
+  private long id;
+  private String configID;
+  private Target target;
+  private Schedule schedule;
+  private Crawler crawler;
+  private List<Item> items;
 
-	public long getId() {
-		return id;
-	}
+  public long getId() {
+    return id;
+  }
 
-	public void setId(long id) {
-		this.id = id;
-	}
+  public void setId(long id) {
+    this.id = id;
+  }
 
-	public String getConfigID() {
-		return configID;
-	}
+  public String getConfigID() {
+    return configID;
+  }
 
-	public void setConfigID(String configID) {
-		this.configID = configID;
-	}
+  public void setConfigID(String configID) {
+    this.configID = configID;
+  }
 
-	public Target getTarget() {
-		return target;
-	}
+  public Target getTarget() {
+    return target;
+  }
 
-	public void setTarget(Target target) {
-		this.target = target;
-	}
+  public void setTarget(Target target) {
+    this.target = target;
+  }
 
-	public Schedule getSchedule() {
-		return schedule;
-	}
+  public Schedule getSchedule() {
+    return schedule;
+  }
 
-	public void setSchedule(Schedule schedule) {
-		this.schedule = schedule;
-	}
+  public void setSchedule(Schedule schedule) {
+    this.schedule = schedule;
+  }
 
-	public Crawler getCrawler() {
-		return crawler;
-	}
+  public Crawler getCrawler() {
+    return crawler;
+  }
 
-	public void setCrawler(Crawler crawler) {
-		this.crawler = crawler;
-	}
+  public void setCrawler(Crawler crawler) {
+    this.crawler = crawler;
+  }
 
-	public List<Item> getItems() {
-		return items;
-	}
+  public List<Item> getItems() {
+    return items;
+  }
 
-	public void setItems(List<Item> items) {
-		this.items = items;
-	}
+  public void setItems(List<Item> items) {
+    this.items = items;
+  }
 }
\ No newline at end of file