Add stub api class.

api/pom.xml

@@ -0,0 +1,28 @@
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>net.md-5</groupId>
+        <artifactId>bungeecord-parent</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <groupId>net.md-5</groupId>
+    <artifactId>bungeecord-api</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>BungeeCord-API</name>
+    <description>API implemented by the Elastic Portal Suite</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>13.0.1</version>
+        </dependency>
+    </dependencies>
+</project>

api/src/main/java/net/md_5/bungee/api/ProxyServer.java

@@ -0,0 +1,16 @@
+package net.md_5.bungee.api;
+
+import com.google.common.base.Preconditions;
+import lombok.Getter;
+
+public abstract class ProxyServer {
+
+    @Getter
+    private static ProxyServer instance;
+
+    public static void setInstance(ProxyServer instance) {
+        Preconditions.checkNotNull(instance, "Instance null");
+        Preconditions.checkArgument(instance == null, "Instance already set");
+        ProxyServer.instance = instance;
+    }
+}