Add checkstyle config for brace style

cache/src/main/java/net/runelite/cache/ItemManager.java

@@ -89,7 +89,8 @@ public class ItemManager
 			fw.println("/* This file is automatically generated. Do not edit. */");
 			fw.println("package net.runelite.api;");
 			fw.println("");
-			fw.println("public final class ItemID {");
+			fw.println("public final class ItemID");
+			fw.println("{");
 			for (ItemDefinition def : items)
 			{
 				if (def.name.equalsIgnoreCase("NULL"))

cache/src/main/java/net/runelite/cache/NpcManager.java

@@ -84,7 +84,8 @@ public class NpcManager
 			fw.println("/* This file is automatically generated. Do not edit. */");
 			fw.println("package net.runelite.api;");
 			fw.println("");
-			fw.println("public final class NpcID {");
+			fw.println("public final class NpcID");
+			fw.println("{");
 			for (NpcDefinition def : npcs)
 			{
 				if (def.name.equalsIgnoreCase("NULL"))

cache/src/main/java/net/runelite/cache/ObjectManager.java

@@ -89,7 +89,8 @@ public class ObjectManager
 			fw.println("/* This file is automatically generated. Do not edit. */");
 			fw.println("package net.runelite.api;");
 			fw.println("");
-			fw.println("public final class ObjectID {");
+			fw.println("public final class ObjectID");
+			fw.println("{");
 			for (ObjectDefinition def : objects)
 			{
 				if (def.getName().equalsIgnoreCase("NULL"))

checkstyle.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<module name="Checker">
+	<module name="TreeWalker">
+		<module name="LeftCurly">
+			<property name="option" value="nl"/>
+		</module>
+	</module>
+	<module name="SuppressionFilter">
+		<property name="file" value="suppressions.xml"/>
+	</module>
+</module>

model-viewer-rsmv/pom.xml

@@ -40,4 +40,17 @@
 	<groupId>net.runelite</groupId>
 	<artifactId>modelviewer-rsmv</artifactId>
 	<name>Model Viewer (RSMV)</name>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-checkstyle-plugin</artifactId>
+				<configuration>
+					<!-- always skip checkstyle despite profile overriden checkstyle.skip property -->
+					<skip>true</skip>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
 </project>

pom.xml

@@ -39,6 +39,7 @@
 		<maven.compiler.target>1.8</maven.compiler.target>
 
 		<maven.javadoc.skip>true</maven.javadoc.skip>
+		<checkstyle.skip>true</checkstyle.skip>
 
 		<rs.version>144</rs.version>
 	</properties>
@@ -110,6 +111,24 @@
 					</execution>
 				</executions>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-checkstyle-plugin</artifactId>
+				<executions>
+					<execution>
+						<id>verify-style</id>
+						<phase>process-classes</phase>
+						<goals>
+							<goal>check</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<configLocation>checkstyle.xml</configLocation>
+					<!-- exclude generated sources from checkstyle https://stackoverflow.com/a/30406454/7189686 -->
+					<sourceDirectory>${project.build.sourceDirectory}</sourceDirectory>
+				</configuration>
+			</plugin>
 		</plugins>
 		<extensions>
 			<extension>

runelite-api/src/main/java/net/runelite/api/ItemID.java

@@ -1,7 +1,8 @@
 /* This file is automatically generated. Do not edit. */
 package net.runelite.api;
 
-public final class ItemID {
+public final class ItemID
+{
 	public static final int DWARF_REMAINS = 0;
 	public static final int TOOLKIT = 1;
 	public static final int CANNONBALL = 2;

runelite-api/src/main/java/net/runelite/api/NpcID.java

@@ -1,7 +1,8 @@
 /* This file is automatically generated. Do not edit. */
 package net.runelite.api;
 
-public final class NpcID {
+public final class NpcID
+{
 	public static final int TOOL_LEPRECHAUN = 0;
 	public static final int MOLANISK = 1;
 	public static final int ABERRANT_SPECTRE = 2;

runelite-api/src/main/java/net/runelite/api/ObjectID.java

@@ -1,7 +1,8 @@
 /* This file is automatically generated. Do not edit. */
 package net.runelite.api;
 
-public final class ObjectID {
+public final class ObjectID
+{
 	public static final int CRATE = 1;
 	public static final int CAVE_ENTRANCE = 2;
 	public static final int DOOR = 3;

suppressions.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<!DOCTYPE suppressions PUBLIC
+    "-//Puppy Crawl//DTD Suppressions 1.1//EN"
+    "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+<suppressions>
+    <suppress files="RuntimeTypeAdapterFactory\.java" checks="[a-zA-Z0-9]*"/>
+</suppressions>

travis/settings.xml

@@ -264,6 +264,7 @@ under the License.
       <properties>
         <runelite.tomcat.url>http://api.runelite.net/manager/text</runelite.tomcat.url>
         <maven.javadoc.skip>false</maven.javadoc.skip>
+        <checkstyle.skip>false</checkstyle.skip>
       </properties>
     </profile>
   </profiles>