diff --git a/build.gradle b/build.gradle
index a293ca9..48ad88a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,6 +14,7 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'	
 	implementation('org.springframework.boot:spring-boot-starter-web') {
 		exclude group: 'org.springframework.boot', module: 'spring-boot-starter-json'
 	}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/WelcomeController.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/WelcomeController.java
index a875104..4069d44 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/WelcomeController.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/WelcomeController.java
@@ -3,7 +3,6 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
 import org.springframework.boot.autoconfigure.*;
 import org.springframework.stereotype.Controller;
-import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.*;
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Device.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Device.java
index 12575d0..3f373d6 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Device.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Device.java
@@ -1,12 +1,12 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-import com.google.gson.annotations.Expose;
-
-//Rules
+import javax.persistence.*;
 
 /**
  * Generic abstraction for a smart home device
  */
+@Entity
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class Device {
 
     /**
@@ -17,30 +17,28 @@ public abstract class Device {
         OUTPUT
     }
 
-    private static long nextId = 1;
-
     /**
      * Device identifier
      */
-    @Expose
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "id", updatable = false, nullable = false)
     private long id;
 
     /**
-     * The name for the category of this particular device (e.g 'dimmer').
+     * The name of the device as assigned by the user (e.g. 'Master bedroom light')
      */
-    @Expose
     private String name;
 
     /**
      * The name for the category of this particular device (e.g 'dimmer').
      */
-    @Expose
+    @Column
     private final String kind;
 
     /**
      * The way this device behaves in the automation flow.
      */
-    @Expose
     private final FlowType flowType;
 
 
@@ -49,10 +47,6 @@ public abstract class Device {
     }
 
     public Device(String kind, FlowType flowType) {
-        synchronized (Device.class) {
-            this.id = nextId;
-            nextId++;
-        }
         this.kind = kind;
         this.flowType = flowType;
         this.name = kind + " " + this.id;
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableLight.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableLight.java
index 988d4b5..c79f785 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableLight.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableLight.java
@@ -1,19 +1,20 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class DimmableLight extends Light implements DimmableOutput {
+import javax.persistence.Entity;
+
+@Entity
+public class DimmableLight extends Light {
 
     /**
      * The light intensity value. Goes from 0 (off) to 100 (on)
      */
     private int intensity = 0;
 
-    @Override
-    public int getDimLevel() {
+    public int getIntensity() {
         return intensity;
     }
 
-    @Override
-    public void dimTo(int level) {
-        intensity = level;
+    public void setIntensity(int intensity) {
+        this.intensity = intensity;
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableOutput.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableOutput.java
deleted file mode 100644
index ccdc80a..0000000
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/DimmableOutput.java
+++ /dev/null
@@ -1,20 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-public interface DimmableOutput extends SwitchableOutput {
-
-    int getDimLevel();
-
-    void dimTo(int level);
-
-    default void dimUp() {
-        int newLevel = getDimLevel() + 10;
-        dimTo(newLevel > 100 ? 100 : newLevel);
-        setStatus(getDimLevel() != 0);
-    }
-
-    default void dimDown() {
-        int newLevel = getDimLevel() - 10;
-        dimTo(newLevel < 0 ? 0 : newLevel);
-        setStatus(getDimLevel() != 0);
-    }
-}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmer.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmer.java
index caf2330..691a7b7 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmer.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmer.java
@@ -1,7 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class Dimmer extends Device {
+import javax.persistence.Entity;
+
+@Entity
+public class Dimmer extends InputDevice {
     public Dimmer() {
-        super("dimmer", FlowType.INPUT);
+        super("dimmer");
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/InputDevice.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/InputDevice.java
index 7af532e..cd36ea4 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/InputDevice.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/InputDevice.java
@@ -1,5 +1,8 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
+import javax.persistence.Entity;
+
+@Entity
 public abstract class InputDevice extends Device {
     public InputDevice(String kind) {
         super(kind, FlowType.INPUT);
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Light.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Light.java
index ad6ad55..989a7fa 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Light.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Light.java
@@ -1,21 +1,24 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class Light extends Device implements SwitchableOutput {
+import javax.persistence.Entity;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
 
-    boolean isOn;
+@Entity
+@Inheritance(strategy = InheritanceType.JOINED)
+public class Light extends OutputDevice {
+    boolean on;
 
     public Light() {
-        super("light", FlowType.OUTPUT);
-        this.isOn = false;
+        super("light");
+        this.on = false;
     }
 
-    @Override
     public boolean isOn() {
-        return isOn;
+        return on;
     }
 
-    @Override
-    public void setStatus(boolean isOn) {
-        this.isOn = isOn;
+    public void setOn(boolean on) {
+        this.on = on;
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/MotionSensor.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/MotionSensor.java
index c76cb76..4526e97 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/MotionSensor.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/MotionSensor.java
@@ -1,7 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class MotionSensor extends Device {
+import javax.persistence.Entity;
+
+@Entity
+public class MotionSensor extends InputDevice {
     public MotionSensor() {
-        super("motion-sensor", FlowType.INPUT);
+        super("motion-sensor");
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/OutputDevice.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/OutputDevice.java
index 634c35e..8c94814 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/OutputDevice.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/OutputDevice.java
@@ -1,5 +1,11 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
+import javax.persistence.Entity;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
+
+@Entity
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class OutputDevice extends Device {
     public OutputDevice(String kind) {
         super(kind, FlowType.OUTPUT);
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Room.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Room.java
new file mode 100644
index 0000000..6e4afa3
--- /dev/null
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Room.java
@@ -0,0 +1,52 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
+
+import javax.persistence.*;
+
+@Entity
+public class Room {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "id", updatable = false, nullable = false)
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name="user_id")
+    private User user;
+
+    @Column
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Room{" +
+                "id=" + id +
+                ", user=" + user +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Rule.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Rule.java
deleted file mode 100644
index a4862dd..0000000
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Rule.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-import javax.validation.constraints.NotNull;
-import java.util.*;
-import java.util.ArrayList;
-
-public abstract class Rule<T extends InputDevice, U extends OutputDevice> {
-
-    private static List<Rule<? extends InputDevice, ? extends OutputDevice>> rules = new ArrayList<>();
-
-    protected T input;
-    protected U output;
-
-    public Rule(T input, U output) {
-        this.input = input;
-        this.output = output;
-    }
-
-    abstract void apply();
-
-    public static void addRule(Rule<? extends InputDevice, ? extends OutputDevice> rule) {
-        rules.add(rule);
-    }
-
-    public static void applyOnInput(@NotNull InputDevice input) {
-        rules.stream().filter(input::equals).forEach(Rule::apply);
-    }
-}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Sensor.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Sensor.java
index e4dafe8..e92c6db 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Sensor.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Sensor.java
@@ -1,7 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class Sensor extends Device {
+import javax.persistence.Entity;
+
+@Entity
+public class Sensor extends InputDevice {
     public Sensor() {
-        super("sensor", FlowType.INPUT);
+        super("sensor");
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SmartPlug.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SmartPlug.java
index 0b3a2e7..6d7db70 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SmartPlug.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SmartPlug.java
@@ -1,7 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class SmartPlug extends Device {
+import javax.persistence.Entity;
+
+@Entity
+public class SmartPlug extends OutputDevice {
     public SmartPlug() {
-        super("smart-plug", FlowType.OUTPUT);
+        super("smart-plug");
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switch.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switch.java
index cc56c3f..142665c 100644
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switch.java
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switch.java
@@ -1,7 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public class Switch extends Device {
+import javax.persistence.Entity;
+
+@Entity
+public class Switch extends InputDevice {
     public Switch() {
-        super("switch", FlowType.INPUT);
+        super("switch");
     }
 }
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchRule.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchRule.java
deleted file mode 100644
index 0430176..0000000
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchRule.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-public class SwitchRule<T extends InputDevice, U extends OutputDevice & SwitchableOutput> extends Rule<T, U> {
-    public SwitchRule(T input, U output) {
-        super(input, output);
-    }
-
-    @Override
-    void apply() {
-        output.toggle();
-    }
-}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchableOutput.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchableOutput.java
deleted file mode 100644
index aaa5b23..0000000
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/SwitchableOutput.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-public interface SwitchableOutput {
-    boolean isOn();
-    void setStatus(boolean isOn);
-
-    default void toggle() {
-        setStatus(!isOn());
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/TimerRule.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/TimerRule.java
deleted file mode 100644
index ad78358..0000000
--- a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/TimerRule.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-public class TimerRule<T extends InputDevice, U extends OutputDevice & SwitchableOutput> extends Rule<T, U> {
-    public TimerRule(T input, U output) {
-        super(input, output);
-    }
-
-    @Override
-    void apply() {
-
-    }
-}
diff --git a/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/User.java b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/User.java
new file mode 100644
index 0000000..294dcf3
--- /dev/null
+++ b/src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/User.java
@@ -0,0 +1,72 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
+
+import javax.persistence.*;
+import java.util.Set;
+
+@Entity
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "id", updatable = false, nullable = false)
+    private Long id;
+
+    @Column
+    private String name;
+
+    @Column
+    private String hashedPassword;
+
+    @Column
+    private String email;
+
+    @OneToMany(mappedBy = "user")
+    private Set<Room> rooms;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getHashedPassword() {
+        return hashedPassword;
+    }
+
+    public void setHashedPassword(String hashedPassword) {
+        this.hashedPassword = hashedPassword;
+    }
+
+    public Set<Room> getRooms() {
+        return rooms;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", hashedPassword='" + hashedPassword + '\'' +
+                ", email='" + email + '\'' +
+                ", rooms=" + rooms +
+                '}';
+    }
+}