+ * Marker interface vs annotation
+ * Marker interfaces and marker annotations both have their uses,
+ * neither of them is obsolete or always better then the other one.
+ * If you want to define a type that does not have any new methods associated with it,
+ * a marker interface is the way to go.
+ * If you want to mark program elements other than classes and interfaces,
+ * to allow for the possibility of adding more information to the marker in the future,
+ * or to fit the marker into a framework that already makes heavy use of annotation types,
+ * then a marker annotation is the correct choice
+ */
+public class App {
+
+ /**
+ * Program entry point
+ *
+ * @param args command line args
+ */
+ public static void main(String[] args) {
+
+ final Logger logger = LoggerFactory.getLogger(App.class);
+ Guard guard = new Guard();
+ Thief thief = new Thief();
+
+ if (guard instanceof Permission) {
+ guard.enter();
+ } else {
+ logger.info("You have no permission to enter, please leave this area");
+ }
+
+ if (thief instanceof Permission) {
+ thief.steal();
+ } else {
+ thief.doNothing();
+ }
+ }
+}
+
diff --git a/marker/src/main/java/Guard.java b/marker/src/main/java/Guard.java
new file mode 100644
index 000000000..14016f0b1
--- /dev/null
+++ b/marker/src/main/java/Guard.java
@@ -0,0 +1,15 @@
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class defining Guard
+ */
+public class Guard implements Permission {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(Guard.class);
+
+ protected static void enter() {
+
+ LOGGER.info("You can enter");
+ }
+}
diff --git a/marker/src/main/java/Permission.java b/marker/src/main/java/Permission.java
new file mode 100644
index 000000000..c6e78c49d
--- /dev/null
+++ b/marker/src/main/java/Permission.java
@@ -0,0 +1,6 @@
+/**
+ * Interface without any methods
+ * Marker interface is based on that assumption
+ */
+public interface Permission {
+}
diff --git a/marker/src/main/java/Thief.java b/marker/src/main/java/Thief.java
new file mode 100644
index 000000000..9105057e3
--- /dev/null
+++ b/marker/src/main/java/Thief.java
@@ -0,0 +1,18 @@
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class defining Thief
+ */
+public class Thief {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(Thief.class);
+
+ protected static void steal() {
+ LOGGER.info("Steal valuable items");
+ }
+
+ protected static void doNothing() {
+ LOGGER.info("Pretend nothing happened and just leave");
+ }
+}
diff --git a/marker/src/test/java/AppTest.java b/marker/src/test/java/AppTest.java
new file mode 100644
index 000000000..55fb2a17f
--- /dev/null
+++ b/marker/src/test/java/AppTest.java
@@ -0,0 +1,13 @@
+import org.junit.Test;
+
+/**
+ * Application test
+ */
+public class AppTest {
+
+ @Test
+ public void test() {
+ String[] args = {};
+ App.main(args);
+ }
+}
diff --git a/marker/src/test/java/GuardTest.java b/marker/src/test/java/GuardTest.java
new file mode 100644
index 000000000..8b33b6e7f
--- /dev/null
+++ b/marker/src/test/java/GuardTest.java
@@ -0,0 +1,16 @@
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Guard test
+ */
+public class GuardTest {
+
+ @Test
+ public void testGuard() {
+ Guard guard = new Guard();
+ assertThat(guard, instanceOf(Permission.class));
+ }
+}
\ No newline at end of file
diff --git a/marker/src/test/java/ThiefTest.java b/marker/src/test/java/ThiefTest.java
new file mode 100644
index 000000000..71fe82b68
--- /dev/null
+++ b/marker/src/test/java/ThiefTest.java
@@ -0,0 +1,14 @@
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+
+/**
+ * Thief test
+ */
+public class ThiefTest {
+ @Test
+ public void testThief() {
+ Thief thief = new Thief();
+ assertFalse(thief instanceof Permission);
+ }
+}
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index d49a5aa24..f843b80e9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -140,6 +140,7 @@