Add the Given-When-Then annotations.

src/main/java/space/kklochko/simple_jbdd/annotations/Given.java

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+package space.kklochko.simple_jbdd.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface Given {
+    String value() default "Given";
+}
+

src/main/java/space/kklochko/simple_jbdd/annotations/Then.java

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+package space.kklochko.simple_jbdd.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface Then {
+    String value() default "Then";
+}
+

src/main/java/space/kklochko/simple_jbdd/annotations/When.java

@@ -0,0 +1,13 @@
+package space.kklochko.simple_jbdd.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface When {
+    String value() default "When";
+}
+