Adding initial project files

.gitignore

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+# IntelliJ project files
+*.iml
+.idea
+out
+gen
+.gradle/
+build/

build.gradle

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+buildscript {
+    repositories {
+        maven { url 'http://dl.bintray.com/jetbrains/intellij-plugin-service' }
+    }
+
+}
+
+plugins {
+    id "org.jetbrains.intellij" version "0.2.17"
+}
+
+repositories {
+    mavenCentral()
+}
+
+apply plugin: 'java'
+sourceCompatibility = 1.8
+group 'org.myorg'
+version '1.0-SNAPSHOT'
+
+apply plugin: 'org.jetbrains.intellij'
+intellij {
+    //For a full list of IntelliJ IDEA releases, please see https://www.jetbrains.com/intellij-repository/releases.
+    version 'IC-2017.2.5'
+    pluginName 'Sample-Plugin'
+    updateSinceUntilBuild false
+    plugins 'coverage' //Bundled plugin dependencies
+}

settings.gradle

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+rootProject.name = 'SimplePlugin'
+

src/main/java/org/myorg/SimpleFileType.java

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+package org.myorg;
+
+import com.intellij.openapi.fileTypes.LanguageFileType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.Icon;
+
+public class SimpleFileType extends LanguageFileType {
+
+    public static final SimpleFileType INSTANCE = new SimpleFileType();
+
+    private SimpleFileType() {
+        super(SimpleLanguage.INSTANCE);
+    }
+
+    @NotNull
+    @Override
+    public String getName() {
+        return "Simple file";
+    }
+
+    @NotNull
+    @Override
+    public String getDescription() {
+        return "Simple language file";
+    }
+
+    @NotNull
+    @Override
+    public String getDefaultExtension() {
+        return "simple";
+    }
+
+    @Nullable
+    @Override
+    public Icon getIcon() {
+        return SimpleIcons.ICON;
+    }
+}

src/main/java/org/myorg/SimpleFileTypeFactory.java

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+package org.myorg;
+
+import com.intellij.openapi.fileTypes.FileTypeConsumer;
+import com.intellij.openapi.fileTypes.FileTypeFactory;
+import org.jetbrains.annotations.NotNull;
+
+public class SimpleFileTypeFactory extends FileTypeFactory {
+
+    @Override
+    public void createFileTypes(@NotNull FileTypeConsumer fileTypeConsumer) {
+        fileTypeConsumer.consume(SimpleFileType.INSTANCE, "simple");
+    }
+}

src/main/java/org/myorg/SimpleIcons.java

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+package org.myorg;
+
+import com.intellij.openapi.util.IconLoader;
+
+import javax.swing.*;
+
+public class SimpleIcons {
+    public static final Icon ICON = IconLoader.getIcon("/icons/simple.png");
+}

src/main/java/org/myorg/SimpleLanguage.java

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+package org.myorg;
+
+import com.intellij.lang.Language;
+
+public class SimpleLanguage extends Language {
+    public static final SimpleLanguage INSTANCE = new SimpleLanguage();
+
+    private SimpleLanguage() {
+        super("Simple");
+    }
+}

src/main/resources/META-INF/plugin.xml

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+<idea-plugin>
+    <id>org.myorg</id>
+    <name>Simple</name>
+    <version>1.0</version>
+    <vendor email="sample@sample.com" url="sample.com">Sample</vendor>
+
+    <description><![CDATA[
+      Enter short description for your plugin here.<br>
+      <em>most HTML tags may be used</em>
+    ]]></description>
+
+    <change-notes><![CDATA[
+      Add change notes here.<br>
+      <em>most HTML tags may be used</em>
+    ]]>
+    </change-notes>
+
+    <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html for description -->
+    <idea-version since-build="162"/>
+
+    <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/plugin_compatibility.html
+         on how to target different products -->
+    <!-- uncomment to enable plugin in all products
+    <depends>com.intellij.modules.lang</depends>
+    -->
+
+    <extensions defaultExtensionNs="com.intellij">
+        <fileTypeFactory implementation="org.myorg.SimpleFileTypeFactory"/>
+    </extensions>
+
+    <actions>
+        <!-- Add your actions here -->
+    </actions>
+
+</idea-plugin>