diff --git a/src/main/java/info/bukova/isspst/data/BaseSimpleData.java b/src/main/java/info/bukova/isspst/data/BaseSimpleData.java
new file mode 100644
index 00000000..d25c9fce
--- /dev/null
+++ b/src/main/java/info/bukova/isspst/data/BaseSimpleData.java
@@ -0,0 +1,65 @@
+package info.bukova.isspst.data;
+
+import java.util.Date;
+
+import javax.persistence.Column;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+import javax.persistence.Transient;
+
+@MappedSuperclass
+public abstract class BaseSimpleData implements DataModel {
+
+	@Id
+	@Column(name="ID")
+    @GeneratedValue
+	private int id;
+	@Column(name="CREATED")
+	private Date created;
+	@Column(name="MODIFIED")
+	private Date modified;
+	@Transient
+	private boolean valid;
+	
+	@Override
+	public int getId() {
+		return id;
+	}
+	
+	@Override
+	public void setId(int id) {
+		this.id = id;
+	}
+	
+	@Override
+	public Date getCreated() {
+		return created;
+	}
+	
+	@Override
+	public void setCreated(Date created) {
+		this.created = created;
+	}
+	
+	@Override
+	public Date getModified() {
+		return modified;
+	}
+	
+	@Override
+	public void setModified(Date modified) {
+		this.modified = modified;
+	}
+	
+	@Override
+	public boolean isValid() {
+		return valid;
+	}
+	
+	@Override
+	public void setValid(boolean valid) {
+		this.valid = valid;
+	}
+	
+}
diff --git a/src/main/java/info/bukova/isspst/data/Role.java b/src/main/java/info/bukova/isspst/data/Role.java
index b957606f..4c7bbc2f 100644
--- a/src/main/java/info/bukova/isspst/data/Role.java
+++ b/src/main/java/info/bukova/isspst/data/Role.java
@@ -1,40 +1,25 @@
 package info.bukova.isspst.data;
 
-import java.util.Date;
-
 import javax.persistence.Column;
 import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
 import javax.persistence.Table;
-import javax.persistence.Transient;
 
 import org.springframework.security.core.GrantedAuthority;
 
 @Entity
 @Table(name="ROLE")
-public class Role implements GrantedAuthority, DataModel {
+public class Role extends BaseSimpleData implements GrantedAuthority, DataModel {
 	
 	/**
 	 * 
 	 */
 	private static final long serialVersionUID = 5677876140880991163L;
 	
-	@Id
-	@Column(name="ID")
-    @GeneratedValue
-	private int id;
 	@Column(name="AUTHORITY", unique=true)
 	private String authority;
 	@Column(name="DESCRIPTION")
 	private String description;
-	@Column(name="CREATED")
-	private Date created;
-	@Column(name="MODIFIED")
-	private Date modified;
-	@Transient
-	private boolean valid;
-	
+		
 	public Role(String authority, String description) {
 		this.authority = authority;
 		this.description = description;
@@ -49,14 +34,6 @@ public class Role implements GrantedAuthority, DataModel {
 		return authority;
 	}
 
-	public int getId() {
-		return id;
-	}
-
-	public void setId(int id) {
-		this.id = id;
-	}
-
 	public String getDescription() {
 		return description;
 	}
@@ -69,33 +46,9 @@ public class Role implements GrantedAuthority, DataModel {
 		this.authority = authority;
 	}
 
-	public Date getCreated() {
-		return created;
-	}
-
-	public void setCreated(Date created) {
-		this.created = created;
-	}
-
-	public Date getModified() {
-		return modified;
-	}
-
-	public void setModified(Date modified) {
-		this.modified = modified;
-	}
-
-	public boolean isValid() {
-		return valid;
-	}
-
-	public void setValid(boolean valid) {
-		this.valid = valid;
-	}
-	
 	@Override
 	public boolean equals(Object o) {
-		if ((o instanceof Role) && ((Role)o).getId() == this.id) {
+		if ((o instanceof Role) && ((Role)o).getId() == this.getId()) {
 			return true;
 		} else {
 			return false;
diff --git a/src/main/java/info/bukova/isspst/data/User.java b/src/main/java/info/bukova/isspst/data/User.java
index fc3c20d7..34790a9e 100644
--- a/src/main/java/info/bukova/isspst/data/User.java
+++ b/src/main/java/info/bukova/isspst/data/User.java
@@ -1,35 +1,27 @@
 package info.bukova.isspst.data;
 
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.List;
 
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.JoinTable;
 import javax.persistence.ManyToMany;
 import javax.persistence.Table;
-import javax.persistence.Transient;
 
 import org.springframework.security.core.userdetails.UserDetails;
 
 @Entity
 @Table(name="USER")
-public class User implements UserDetails, DataModel {
+public class User extends BaseSimpleData implements UserDetails, DataModel {
 
 	/**
 	 * 
 	 */
 	private static final long serialVersionUID = 5421234421833765433L;
 	
-	@Id
-	@Column(name="ID")
-    @GeneratedValue
-	private int id;
 	@Column(name="USERNAME", unique=true)
 	private String username;
 	@Column(name="PASSWORD")
@@ -49,13 +41,7 @@ public class User implements UserDetails, DataModel {
 	@ManyToMany(fetch=FetchType.EAGER) 
 	@JoinTable(name="USER_ROLE", joinColumns={@JoinColumn(name="USER_ID")}, inverseJoinColumns={@JoinColumn(name="ROLE_ID")})
 	private List<Role> authorities;
-	@Column(name="CREATED")
-	private Date created;
-	@Column(name="MODIFIED")
-	private Date modified;
-	@Transient
-	private boolean valid;
-	
+		
 	public User() {
 		authorities = new ArrayList<Role>();
 	}
@@ -95,14 +81,6 @@ public class User implements UserDetails, DataModel {
 		return enabled;
 	}
 
-	public int getId() {
-		return id;
-	}
-
-	public void setId(int id) {
-		this.id = id;
-	}
-
 	public void setPassword(String password) {
 		this.password = password;
 	}
@@ -123,30 +101,6 @@ public class User implements UserDetails, DataModel {
 		this.authorities.add(role);
 	}
 
-	public Date getCreated() {
-		return created;
-	}
-
-	public void setCreated(Date created) {
-		this.created = created;
-	}
-
-	public Date getModified() {
-		return modified;
-	}
-
-	public void setModified(Date modified) {
-		this.modified = modified;
-	}
-
-	public boolean isValid() {
-		return valid;
-	}
-
-	public void setValid(boolean valid) {
-		this.valid = valid;
-	}
-
 	public String getFullName() {
 		String ret = "";
 		if (firstName != null && !firstName.isEmpty()) {