Fix prelaunch check

Author: thejudge156

src/main/java/pojlib/API.java

@@ -22,6 +22,7 @@
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.util.concurrent.ExecutionException;
 
 /**
  * This class is the only class used by the launcher to communicate and talk to pojlib. This keeps pojlib and launcher separate.
@@ -177,7 +178,7 @@ public static void prelaunch(Activity activity, MinecraftInstances instances, Mi
         if (hasConnection(activity)) {
             try {
                 JREUtils.prelaunchCheck(activity, instance);
-            } catch (IOException e) {
+            } catch (IOException | ExecutionException | InterruptedException e) {
                 Logger.getInstance().appendToLog("WARN! Instance launch failed!" + e);
             }
         } else {

src/main/java/pojlib/util/JREUtils.java

@@ -24,6 +24,7 @@
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ExecutionException;
 
 import pojlib.API;
 
@@ -183,12 +184,12 @@ public static void setJavaEnvironment(Activity activity, MinecraftInstances.Inst
     }
 
     // Called before game launch to ensure all files are present and correct
-    public static void prelaunchCheck(Activity activity, MinecraftInstances.Instance instance) throws IOException {
+    public static void prelaunchCheck(Activity activity, MinecraftInstances.Instance instance) throws IOException, ExecutionException, InterruptedException {
         UnityPlayerActivity.installLWJGL(activity);
         Installer.installJVM(activity);
-        Installer.installClient(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME);
-        Installer.installLibraries(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME);
-        Installer.installAssets(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME);
+        Installer.installClient(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME).get();
+        Installer.installLibraries(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME).get();
+        Installer.installAssets(MinecraftMeta.getVersionInfo(instance.versionName), Constants.USER_HOME).get();
     }
 
     public static int launchJavaVM(final Activity activity, final List<String> JVMArgs, MinecraftInstances.Instance instance) throws Throwable {