diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 2996d53..7ac24c7 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -3,11 +3,14 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <compositeConfiguration>
-          <compositeBuild compositeDefinitionSource="SCRIPT" />
-        </compositeConfiguration>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
         <option name="resolveModulePerSourceSet" value="false" />
       </GradleProjectSettings>
     </option>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 37a7509..dc34569 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,31 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
+    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="5">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
+          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+        </list>
+      </value>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle b/app/build.gradle
index 83b25fc..f3d265c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -21,7 +21,7 @@ android {
 dependencies {
     implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
-    //implementation 'com.google.android.material:material:1.1.0-alpha08'
+    implementation 'com.android.support:design:28.0.0'
     implementation 'com.madgag.spongycastle:core:1.54.0.0'
     implementation 'com.madgag.spongycastle:prov:1.54.0.0'
     implementation 'com.madgag.spongycastle:pkix:1.54.0.0'
diff --git a/app/src/androidTest/java/com/MartyrPher/smapiandroidinstaller/ExampleInstrumentedTest.java b/app/src/androidTest/java/com/MartyrPher/smapiandroidinstaller/ExampleInstrumentedTest.java
deleted file mode 100644
index d0f4912..0000000
--- a/app/src/androidTest/java/com/MartyrPher/smapiandroidinstaller/ExampleInstrumentedTest.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.MartyrPher.smapiandroidinstaller;
-
-import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getTargetContext();
-
-        assertEquals("com.MartyrPher.smapiandroidinstaller", appContext.getPackageName());
-    }
-}
diff --git a/app/src/test/java/com/MartyrPher/smapiandroidinstaller/ExampleUnitTest.java b/app/src/test/java/com/MartyrPher/smapiandroidinstaller/ExampleUnitTest.java
deleted file mode 100644
index b743377..0000000
--- a/app/src/test/java/com/MartyrPher/smapiandroidinstaller/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.MartyrPher.smapiandroidinstaller;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() {
-        assertEquals(4, 2 + 2);
-    }
-}
\ No newline at end of file