Add project parent module

src/main/java/com/cubetiqs/lang/NonNull.java

@@ -0,0 +1,14 @@
+package com.cubetiqs.lang;
+
+import java.lang.annotation.*;
+
+
+/**
+ * @author sombochea
+ * @since 1.0
+ */
+@Target({ElementType.METHOD, ElementType.PARAMETER, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface NonNull {
+}

src/main/java/com/cubetiqs/lang/Nullable.java

@@ -0,0 +1,14 @@
+package com.cubetiqs.lang;
+
+import java.lang.annotation.*;
+
+
+/**
+ * @author sombochea
+ * @since 1.0
+ */
+@Target({ElementType.METHOD, ElementType.PARAMETER, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface Nullable {
+}