diff --git a/.idea/compiler.xml b/.idea/compiler.xml
new file mode 100644
index 0000000000..c65826db88
--- /dev/null
+++ b/.idea/compiler.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="lang-tutorial" />
+      </profile>
+    </annotationProcessing>
+    <bytecodeTargetLevel>
+      <module name="lang-tutorial" target="1.8" />
+    </bytecodeTargetLevel>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
new file mode 100644
index 0000000000..aa00ffab78
--- /dev/null
+++ b/.idea/encodings.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
new file mode 100644
index 0000000000..712ab9d985
--- /dev/null
+++ b/.idea/jarRepositories.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__ch_qos_logback_logback_classic_1_1_7.xml b/.idea/libraries/Maven__ch_qos_logback_logback_classic_1_1_7.xml
new file mode 100644
index 0000000000..cdd79598ea
--- /dev/null
+++ b/.idea/libraries/Maven__ch_qos_logback_logback_classic_1_1_7.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: ch.qos.logback:logback-classic:1.1.7">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-classic/1.1.7/logback-classic-1.1.7.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-classic/1.1.7/logback-classic-1.1.7-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-classic/1.1.7/logback-classic-1.1.7-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__ch_qos_logback_logback_core_1_1_7.xml b/.idea/libraries/Maven__ch_qos_logback_logback_core_1_1_7.xml
new file mode 100644
index 0000000000..6c2a7607f1
--- /dev/null
+++ b/.idea/libraries/Maven__ch_qos_logback_logback_core_1_1_7.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: ch.qos.logback:logback-core:1.1.7">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-core/1.1.7/logback-core-1.1.7.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-core/1.1.7/logback-core-1.1.7-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/ch/qos/logback/logback-core/1.1.7/logback-core-1.1.7-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__commons_cli_commons_cli_1_2.xml b/.idea/libraries/Maven__commons_cli_commons_cli_1_2.xml
new file mode 100644
index 0000000000..cec24931ef
--- /dev/null
+++ b/.idea/libraries/Maven__commons_cli_commons_cli_1_2.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: commons-cli:commons-cli:1.2">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/commons-cli/commons-cli/1.2/commons-cli-1.2.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/commons-cli/commons-cli/1.2/commons-cli-1.2-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/commons-cli/commons-cli/1.2/commons-cli-1.2-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__net_bytebuddy_byte_buddy_1_8_15.xml b/.idea/libraries/Maven__net_bytebuddy_byte_buddy_1_8_15.xml
new file mode 100644
index 0000000000..c7e234c123
--- /dev/null
+++ b/.idea/libraries/Maven__net_bytebuddy_byte_buddy_1_8_15.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: net.bytebuddy:byte-buddy:1.8.15">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy/1.8.15/byte-buddy-1.8.15.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy/1.8.15/byte-buddy-1.8.15-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy/1.8.15/byte-buddy-1.8.15-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__net_bytebuddy_byte_buddy_agent_1_8_15.xml b/.idea/libraries/Maven__net_bytebuddy_byte_buddy_agent_1_8_15.xml
new file mode 100644
index 0000000000..a0c169abac
--- /dev/null
+++ b/.idea/libraries/Maven__net_bytebuddy_byte_buddy_agent_1_8_15.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: net.bytebuddy:byte-buddy-agent:1.8.15">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy-agent/1.8.15/byte-buddy-agent-1.8.15.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy-agent/1.8.15/byte-buddy-agent-1.8.15-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy-agent/1.8.15/byte-buddy-agent-1.8.15-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_apache_commons_commons_lang3_3_11.xml b/.idea/libraries/Maven__org_apache_commons_commons_lang3_3_11.xml
new file mode 100644
index 0000000000..7a30e6e396
--- /dev/null
+++ b/.idea/libraries/Maven__org_apache_commons_commons_lang3_3_11.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.apache.commons:commons-lang3:3.11">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-lang3/3.11/commons-lang3-3.11.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-lang3/3.11/commons-lang3-3.11-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-lang3/3.11/commons-lang3-3.11-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_apache_commons_commons_math3_3_6_1.xml b/.idea/libraries/Maven__org_apache_commons_commons_math3_3_6_1.xml
new file mode 100644
index 0000000000..ebfe0a8655
--- /dev/null
+++ b/.idea/libraries/Maven__org_apache_commons_commons_math3_3_6_1.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.apache.commons:commons-math3:3.6.1">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-math3/3.6.1/commons-math3-3.6.1.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-math3/3.6.1/commons-math3-3.6.1-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/commons/commons-math3/3.6.1/commons-math3-3.6.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_apache_maven_surefire_surefire_logger_api_2_21_0.xml b/.idea/libraries/Maven__org_apache_maven_surefire_surefire_logger_api_2_21_0.xml
new file mode 100644
index 0000000000..7ee7fe0883
--- /dev/null
+++ b/.idea/libraries/Maven__org_apache_maven_surefire_surefire_logger_api_2_21_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.apache.maven.surefire:surefire-logger-api:2.21.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/maven/surefire/surefire-logger-api/2.21.0/surefire-logger-api-2.21.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/maven/surefire/surefire-logger-api/2.21.0/surefire-logger-api-2.21.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apache/maven/surefire/surefire-logger-api/2.21.0/surefire-logger-api-2.21.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_apiguardian_apiguardian_api_1_1_0.xml b/.idea/libraries/Maven__org_apiguardian_apiguardian_api_1_1_0.xml
new file mode 100644
index 0000000000..f854ab00fd
--- /dev/null
+++ b/.idea/libraries/Maven__org_apiguardian_apiguardian_api_1_1_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.apiguardian:apiguardian-api:1.1.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.0/apiguardian-api-1.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.0/apiguardian-api-1.1.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.0/apiguardian-api-1.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_hamcrest_hamcrest_all_1_3.xml b/.idea/libraries/Maven__org_hamcrest_hamcrest_all_1_3.xml
new file mode 100644
index 0000000000..56193163f3
--- /dev/null
+++ b/.idea/libraries/Maven__org_hamcrest_hamcrest_all_1_3.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.hamcrest:hamcrest-all:1.3">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-all/1.3/hamcrest-all-1.3.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-all/1.3/hamcrest-all-1.3-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-all/1.3/hamcrest-all-1.3-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml b/.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml
new file mode 100644
index 0000000000..f58bbc1127
--- /dev/null
+++ b/.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.hamcrest:hamcrest-core:1.3">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_hamcrest_hamcrest_library_1_3.xml b/.idea/libraries/Maven__org_hamcrest_hamcrest_library_1_3.xml
new file mode 100644
index 0000000000..78dbe458d4
--- /dev/null
+++ b/.idea/libraries/Maven__org_hamcrest_hamcrest_library_1_3.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.hamcrest:hamcrest-library:1.3">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-library/1.3/hamcrest-library-1.3.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-library/1.3/hamcrest-library-1.3-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-library/1.3/hamcrest-library-1.3-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_api_5_7_0.xml b/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_api_5_7_0.xml
new file mode 100644
index 0000000000..cc01e3f539
--- /dev/null
+++ b/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_api_5_7_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.junit.jupiter:junit-jupiter-api:5.7.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.7.0/junit-jupiter-api-5.7.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.7.0/junit-jupiter-api-5.7.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.7.0/junit-jupiter-api-5.7.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_engine_5_7_0.xml b/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_engine_5_7_0.xml
new file mode 100644
index 0000000000..f198e4bb85
--- /dev/null
+++ b/.idea/libraries/Maven__org_junit_jupiter_junit_jupiter_engine_5_7_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.junit.jupiter:junit-jupiter-engine:5.7.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.7.0/junit-jupiter-engine-5.7.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.7.0/junit-jupiter-engine-5.7.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.7.0/junit-jupiter-engine-5.7.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_junit_platform_junit_platform_commons_1_7_0.xml b/.idea/libraries/Maven__org_junit_platform_junit_platform_commons_1_7_0.xml
new file mode 100644
index 0000000000..cde8a482a9
--- /dev/null
+++ b/.idea/libraries/Maven__org_junit_platform_junit_platform_commons_1_7_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.junit.platform:junit-platform-commons:1.7.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.7.0/junit-platform-commons-1.7.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.7.0/junit-platform-commons-1.7.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.7.0/junit-platform-commons-1.7.0-sources.jar!/" />
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+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_junit_platform_junit_platform_engine_1_7_0.xml b/.idea/libraries/Maven__org_junit_platform_junit_platform_engine_1_7_0.xml
new file mode 100644
index 0000000000..3391deb2a7
--- /dev/null
+++ b/.idea/libraries/Maven__org_junit_platform_junit_platform_engine_1_7_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.junit.platform:junit-platform-engine:1.7.0">
+    <CLASSES>
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+    </CLASSES>
+    <JAVADOC>
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+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_mockito_mockito_core_2_21_0.xml b/.idea/libraries/Maven__org_mockito_mockito_core_2_21_0.xml
new file mode 100644
index 0000000000..f3bb7f6b81
--- /dev/null
+++ b/.idea/libraries/Maven__org_mockito_mockito_core_2_21_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.mockito:mockito-core:2.21.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/mockito/mockito-core/2.21.0/mockito-core-2.21.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
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+    <SOURCES>
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\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_objenesis_objenesis_2_6.xml b/.idea/libraries/Maven__org_objenesis_objenesis_2_6.xml
new file mode 100644
index 0000000000..af41e3b617
--- /dev/null
+++ b/.idea/libraries/Maven__org_objenesis_objenesis_2_6.xml
@@ -0,0 +1,13 @@
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+      <root url="jar://$MAVEN_REPOSITORY$/org/objenesis/objenesis/2.6/objenesis-2.6.jar!/" />
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+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/objenesis/objenesis/2.6/objenesis-2.6-javadoc.jar!/" />
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+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_opentest4j_opentest4j_1_2_0.xml b/.idea/libraries/Maven__org_opentest4j_opentest4j_1_2_0.xml
new file mode 100644
index 0000000000..fbc1b1635a
--- /dev/null
+++ b/.idea/libraries/Maven__org_opentest4j_opentest4j_1_2_0.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.opentest4j:opentest4j:1.2.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_slf4j_jcl_over_slf4j_1_7_21.xml b/.idea/libraries/Maven__org_slf4j_jcl_over_slf4j_1_7_21.xml
new file mode 100644
index 0000000000..2f93a6301e
--- /dev/null
+++ b/.idea/libraries/Maven__org_slf4j_jcl_over_slf4j_1_7_21.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.slf4j:jcl-over-slf4j:1.7.21">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/Maven__org_slf4j_slf4j_api_1_7_21.xml b/.idea/libraries/Maven__org_slf4j_slf4j_api_1_7_21.xml
new file mode 100644
index 0000000000..1b644dd840
--- /dev/null
+++ b/.idea/libraries/Maven__org_slf4j_slf4j_api_1_7_21.xml
@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.slf4j:slf4j-api:1.7.21">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000000..17e19eb41d
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000000..da24bb41a5
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/lang-tutorial.iml" filepath="$PROJECT_DIR$/lang-tutorial.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000000..94a25f7f4c
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
new file mode 100644
index 0000000000..3edc2ca039
--- /dev/null
+++ b/.idea/workspace.xml
@@ -0,0 +1,138 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="bc4dcfec-3698-4fde-a6cf-dd08b73f1f06" name="Default Changelist" comment="" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="CodeStyleSettingsInfer">
+    <option name="done" value="true" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_BRANCH_BY_REPOSITORY">
+      <map>
+        <entry key="$PROJECT_DIR$" value="current" />
+      </map>
+    </option>
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="GitSEFilterConfiguration">
+    <file-type-list>
+      <filtered-out-file-type name="LOCAL_BRANCH" />
+      <filtered-out-file-type name="REMOTE_BRANCH" />
+      <filtered-out-file-type name="TAG" />
+      <filtered-out-file-type name="COMMIT_BY_MESSAGE" />
+    </file-type-list>
+  </component>
+  <component name="ProjectCodeStyleSettingsMigration">
+    <option name="version" value="1" />
+  </component>
+  <component name="ProjectId" id="1r1Zx6oqLWRPWaxq39M8I4kCZrQ" />
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent">
+    <property name="Git.Branch.Popup.ShowAllRemotes" value="true" />
+    <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
+    <property name="RunOnceActivity.ShowReadmeOnStart" value="true" />
+    <property name="WebServerToolWindowFactoryState" value="false" />
+    <property name="aspect.path.notification.shown" value="true" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/toolkits/discourse" />
+  </component>
+  <component name="RecentsManager">
+    <key name="CopyFile.RECENT_KEYS">
+      <recent name="C:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\toolkits\discourse" />
+      <recent name="C:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\toolkits" />
+      <recent name="C:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\toolkits\test\java\com\ossez\edtestbank\service\test" />
+      <recent name="C:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\src\test" />
+    </key>
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="C:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\src\test\java\com\ossez\lang\tutorial\tests" />
+    </key>
+  </component>
+  <component name="RunManager">
+    <configuration default="true" type="ArquillianJUnit" factoryName="" nameIsGenerated="true">
+      <option name="arquillianRunConfiguration">
+        <value>
+          <option name="containerStateName" value="" />
+        </value>
+      </option>
+      <option name="TEST_OBJECT" value="class" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+  </component>
+  <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="bc4dcfec-3698-4fde-a6cf-dd08b73f1f06" name="Default Changelist" comment="" />
+      <created>1618145802441</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1618145802441</updated>
+      <workItem from="1618145805266" duration="1634000" />
+      <workItem from="1618147512704" duration="6933000" />
+      <workItem from="1618246818887" duration="17236000" />
+    </task>
+    <task id="LOCAL-00001" summary="更新 POM 文件">
+      <created>1618147556538</created>
+      <option name="number" value="00001" />
+      <option name="presentableId" value="LOCAL-00001" />
+      <option name="project" value="LOCAL" />
+      <updated>1618147556538</updated>
+    </task>
+    <task id="LOCAL-00002" summary="Discourse Topic import">
+      <created>1618147882644</created>
+      <option name="number" value="00002" />
+      <option name="presentableId" value="LOCAL-00002" />
+      <option name="project" value="LOCAL" />
+      <updated>1618147882644</updated>
+    </task>
+    <task id="LOCAL-00003" summary="项目的 POM 配置文件&#10;# Conflicts:&#10;#&#9;pom.xml">
+      <created>1618151038853</created>
+      <option name="number" value="00003" />
+      <option name="presentableId" value="LOCAL-00003" />
+      <option name="project" value="LOCAL" />
+      <updated>1618151038853</updated>
+    </task>
+    <task id="LOCAL-00004" summary="Discourse">
+      <created>1618157753954</created>
+      <option name="number" value="00004" />
+      <option name="presentableId" value="LOCAL-00004" />
+      <option name="project" value="LOCAL" />
+      <updated>1618157753954</updated>
+    </task>
+    <option name="localTasksCounter" value="5" />
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+  <component name="Vcs.Log.Tabs.Properties">
+    <option name="TAB_STATES">
+      <map>
+        <entry key="MAIN">
+          <value>
+            <State />
+          </value>
+        </entry>
+      </map>
+    </option>
+    <option name="oldMeFiltersMigrated" value="true" />
+  </component>
+  <component name="VcsManagerConfiguration">
+    <MESSAGE value="更新 POM 文件" />
+    <MESSAGE value="Discourse Topic import" />
+    <MESSAGE value="项目的 POM 配置文件&#10;# Conflicts:&#10;#&#9;pom.xml" />
+    <MESSAGE value="Discourse" />
+    <option name="LAST_COMMIT_MESSAGE" value="Discourse" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/toolkits/.idea/.gitignore b/toolkits/.idea/.gitignore
new file mode 100644
index 0000000000..cf75470660
--- /dev/null
+++ b/toolkits/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/../../../../../../../:\WorkDir\GitHub\cwiki-us-docs\java-tutorials\toolkits\.idea/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/toolkits/.idea/codeStyles/Project.xml b/toolkits/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000000..919ce1f1f7
--- /dev/null
+++ b/toolkits/.idea/codeStyles/Project.xml
@@ -0,0 +1,7 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <ScalaCodeStyleSettings>
+      <option name="MULTILINE_STRING_CLOSING_QUOTES_ON_NEW_LINE" value="true" />
+    </ScalaCodeStyleSettings>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/toolkits/.idea/codeStyles/codeStyleConfig.xml b/toolkits/.idea/codeStyles/codeStyleConfig.xml
new file mode 100644
index 0000000000..a55e7a179b
--- /dev/null
+++ b/toolkits/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>
\ No newline at end of file
diff --git a/toolkits/.idea/compiler.xml b/toolkits/.idea/compiler.xml
new file mode 100644
index 0000000000..3c6a21132c
--- /dev/null
+++ b/toolkits/.idea/compiler.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="discourse" />
+      </profile>
+    </annotationProcessing>
+    <bytecodeTargetLevel>
+      <module name="discourse" target="11.0.10" />
+      <module name="toolkits" target="1.8" />
+    </bytecodeTargetLevel>
+  </component>
+</project>
\ No newline at end of file
diff --git a/toolkits/.idea/encodings.xml b/toolkits/.idea/encodings.xml
new file mode 100644
index 0000000000..44b56b318b
--- /dev/null
+++ b/toolkits/.idea/encodings.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/discourse/src/main/java" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/toolkits/.idea/jarRepositories.xml b/toolkits/.idea/jarRepositories.xml
new file mode 100644
index 0000000000..712ab9d985
--- /dev/null
+++ b/toolkits/.idea/jarRepositories.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file
diff --git a/toolkits/.idea/vcs.xml b/toolkits/.idea/vcs.xml
new file mode 100644
index 0000000000..6c0b863585
--- /dev/null
+++ b/toolkits/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file