diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4834363
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+gradle.properties
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..c1161a2
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,33 @@
+plugins {
+    id 'java'
+}
+
+group 'com.cubetiqs'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+    maven {
+        url "https://oss-internal.cubetiqs.com/repository/maven-public/"
+    }
+}
+
+dependencies {
+    // import a BOM
+    implementation platform('org.springframework.boot:spring-boot-dependencies:2.3.0.RELEASE')
+
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
+
+//uploadArchives {
+//    repositories {
+//        mavenDeployer {
+//            repository(url: "${nexusUrl}/repository/maven-releases/") {
+//                authentication(userName: nexusUsername, password: nexusPassword)
+//            }
+//            snapshotRepository(url: "${nexusUrl}/repository/maven-snapshots") {
+//                authentication(userName: nexusUsername, password: nexusPassword)
+//            }
+//        }
+//    }
+//}
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..b6f173f
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,3 @@
+nexusUrl=https://oss-internal.cubetiqs.com
+nexusUsername=cubetiq
+nexusPassword=cube17tiq
\ No newline at end of file
diff --git a/gradle.properties.sample b/gradle.properties.sample
new file mode 100644
index 0000000..6494df5
--- /dev/null
+++ b/gradle.properties.sample
@@ -0,0 +1,3 @@
+nexusUrl=https://oss-internal.cubetiqs.com
+nexusUsername=user
+nexusPassword=pass
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..f3d88b1
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..961dbd4
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Mon Jun 08 15:30:03 ICT 2020
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-all.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
\ No newline at end of file
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..fbd7c51
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..a9f778a
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,104 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..397b1c1
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'cubetiq-parent'
diff --git a/src/main/java/com/cubetiqs/Constants.java b/src/main/java/com/cubetiqs/Constants.java
new file mode 100644
index 0000000..b4380c4
--- /dev/null
+++ b/src/main/java/com/cubetiqs/Constants.java
@@ -0,0 +1,11 @@
+package com.cubetiqs;
+
+/**
+ * Static Constants variable global use in sub-modules
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+public class Constants {
+    public static final String __$ = "CONSTANTS";
+}
diff --git a/src/main/java/com/cubetiqs/assertion/Tests.java b/src/main/java/com/cubetiqs/assertion/Tests.java
new file mode 100644
index 0000000..60c2d4e
--- /dev/null
+++ b/src/main/java/com/cubetiqs/assertion/Tests.java
@@ -0,0 +1,130 @@
+package com.cubetiqs.assertion;
+
+/**
+ * Assertion and Tests
+ * This class used for check and validation and throwable error
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+public final class Tests {
+    public static void isTrue(boolean val) throws TestsException {
+        assert val;
+    }
+
+    public static void isTrue(boolean val, String message) throws TestsException {
+        try {
+            isTrue(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNotTrue(boolean val) throws TestsException {
+        assert !val;
+    }
+
+    public static void isNotTrue(boolean val, String message) throws TestsException {
+        try {
+            isNotTrue(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNull(Object val) throws TestsException {
+        assert val == null;
+    }
+
+    public static void isNull(Object val, String message) throws TestsException {
+        try {
+            isNull(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNotNull(Object val) throws TestsException {
+        assert val != null;
+    }
+
+    public static void isNotNull(Object val, String message) throws TestsException {
+        try {
+            isNotNull(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isEmpty(String val) throws TestsException {
+        assert val.isEmpty();
+    }
+
+    public static void isEmpty(String val, String message) throws TestsException {
+        try {
+            isEmpty(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNotEmpty(String val) throws TestsException {
+        assert !val.isEmpty();
+    }
+
+    public static void isNotEmpty(String val, String message) throws TestsException {
+        try {
+            isNotEmpty(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isBlank(String val) throws TestsException {
+        assert val.trim().isEmpty();
+    }
+
+    public static void isBlank(String val, String message) throws TestsException {
+        try {
+            isBlank(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNotBlank(String val) throws TestsException {
+        assert !val.trim().isEmpty();
+    }
+
+    public static void isNotBlank(String val, String message) throws TestsException {
+        try {
+            isNotBlank(val);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isEquals(Object val1, Object val2) throws TestsException {
+        assert val1 == val2;
+    }
+
+    public static void isEquals(Object val1, Object val2, String message) throws TestsException {
+        try {
+            isEquals(val1, val2);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+
+    public static void isNotEquals(Object val1, Object val2) throws TestsException {
+        assert val1 != val2;
+    }
+
+    public static void isNotEquals(Object val1, Object val2, String message) throws TestsException {
+        try {
+            isNotEquals(val1, val2);
+        } catch (AssertionError error) {
+            throw new TestsException(message);
+        }
+    }
+}
diff --git a/src/main/java/com/cubetiqs/assertion/TestsException.java b/src/main/java/com/cubetiqs/assertion/TestsException.java
new file mode 100644
index 0000000..6bef382
--- /dev/null
+++ b/src/main/java/com/cubetiqs/assertion/TestsException.java
@@ -0,0 +1,24 @@
+package com.cubetiqs.assertion;
+
+/**
+ * Default Assertion/Tests Exception
+ *
+ * @author sombochea
+ * @see AssertionError
+ * @see Error
+ * @see Throwable
+ * @since 1.0
+ */
+public class TestsException extends AssertionError {
+    public TestsException() {
+        super("tests failed");
+    }
+
+    public TestsException(String message) {
+        super(message);
+    }
+
+    public TestsException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/src/main/java/com/cubetiqs/event/EventContext.java b/src/main/java/com/cubetiqs/event/EventContext.java
new file mode 100644
index 0000000..21b5261
--- /dev/null
+++ b/src/main/java/com/cubetiqs/event/EventContext.java
@@ -0,0 +1,8 @@
+package com.cubetiqs.event;
+
+/**
+ * @author sombochea
+ * @since 1.0
+ */
+public interface EventContext {
+}
diff --git a/src/main/java/com/cubetiqs/exception/FileNotFoundException.java b/src/main/java/com/cubetiqs/exception/FileNotFoundException.java
new file mode 100644
index 0000000..bf5797f
--- /dev/null
+++ b/src/main/java/com/cubetiqs/exception/FileNotFoundException.java
@@ -0,0 +1,21 @@
+package com.cubetiqs.exception;
+
+/**
+ * File not found exception
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+public class FileNotFoundException extends RIOException {
+    public FileNotFoundException() {
+        super("File not found!");
+    }
+
+    public FileNotFoundException(String message) {
+        super(message);
+    }
+
+    public FileNotFoundException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/src/main/java/com/cubetiqs/exception/RException.java b/src/main/java/com/cubetiqs/exception/RException.java
new file mode 100644
index 0000000..80b337b
--- /dev/null
+++ b/src/main/java/com/cubetiqs/exception/RException.java
@@ -0,0 +1,29 @@
+package com.cubetiqs.exception;
+
+/**
+ * Runtime Exception
+ *
+ * @author sombochea
+ * @see RuntimeException
+ * @since 1.0
+ */
+public class RException extends RuntimeException {
+    public RException() {
+    }
+
+    public RException(String message) {
+        super(message);
+    }
+
+    public RException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public RException(Throwable cause) {
+        super(cause);
+    }
+
+    public RException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}
diff --git a/src/main/java/com/cubetiqs/exception/RIOException.java b/src/main/java/com/cubetiqs/exception/RIOException.java
new file mode 100644
index 0000000..8da47ec
--- /dev/null
+++ b/src/main/java/com/cubetiqs/exception/RIOException.java
@@ -0,0 +1,26 @@
+package com.cubetiqs.exception;
+
+import java.io.IOException;
+
+/**
+ * IO Exception
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+public class RIOException extends IOException {
+    public RIOException() {
+    }
+
+    public RIOException(String message) {
+        super(message);
+    }
+
+    public RIOException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public RIOException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/src/main/java/com/cubetiqs/exception/RNullException.java b/src/main/java/com/cubetiqs/exception/RNullException.java
new file mode 100644
index 0000000..059322b
--- /dev/null
+++ b/src/main/java/com/cubetiqs/exception/RNullException.java
@@ -0,0 +1,24 @@
+package com.cubetiqs.exception;
+
+/**
+ * Null Exception
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+public class RNullException extends RException {
+    public RNullException() {
+    }
+
+    public RNullException(String message) {
+        super(message);
+    }
+
+    public RNullException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public RNullException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/src/main/java/com/cubetiqs/exception/json/RJsonParseException.java b/src/main/java/com/cubetiqs/exception/json/RJsonParseException.java
new file mode 100644
index 0000000..e76583f
--- /dev/null
+++ b/src/main/java/com/cubetiqs/exception/json/RJsonParseException.java
@@ -0,0 +1,4 @@
+package com.cubetiqs.exception.json;
+
+public class RJsonParseException {
+}
diff --git a/src/main/java/com/cubetiqs/lang/NonNull.java b/src/main/java/com/cubetiqs/lang/NonNull.java
new file mode 100644
index 0000000..b68f399
--- /dev/null
+++ b/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 {
+}
diff --git a/src/main/java/com/cubetiqs/lang/Nullable.java b/src/main/java/com/cubetiqs/lang/Nullable.java
new file mode 100644
index 0000000..338cfb8
--- /dev/null
+++ b/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 {
+}
diff --git a/src/test/java/com/cubetiqs/test/AssertionTests.java b/src/test/java/com/cubetiqs/test/AssertionTests.java
new file mode 100644
index 0000000..948fa7a
--- /dev/null
+++ b/src/test/java/com/cubetiqs/test/AssertionTests.java
@@ -0,0 +1,12 @@
+package com.cubetiqs.test;
+
+import com.cubetiqs.assertion.Tests;
+import org.junit.Test;
+
+public class AssertionTests {
+    @Test
+    public void equalsTests() {
+        Tests.isEquals("1", "1", "values are not equals");
+        Tests.isNotEquals("1", "2", "values are equals");
+    }
+}
diff --git a/src/test/java/com/cubetiqs/test/MainTests.java b/src/test/java/com/cubetiqs/test/MainTests.java
new file mode 100644
index 0000000..e3ca192
--- /dev/null
+++ b/src/test/java/com/cubetiqs/test/MainTests.java
@@ -0,0 +1,11 @@
+package com.cubetiqs.test;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class MainTests {
+    @Test
+    public void test() {
+        Assert.assertTrue("this is true", true);
+    }
+}