Code cleanup

core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java

@@ -416,7 +416,8 @@ public class BitmessageContext {
                 customCommandHandler = new CustomCommandHandler() {
                     @Override
                     public MessagePayload handle(CustomMessage request) {
-                        throw new RuntimeException("Received custom request, but no custom command handler configured.");
+                        throw new IllegalStateException(
+                                "Received custom request, but no custom command handler configured.");
                     }
                 };
             }

core/src/main/java/ch/dissem/bitmessage/entity/payload/CryptoBox.java

@@ -17,6 +17,7 @@
 package ch.dissem.bitmessage.entity.payload;
 
 import ch.dissem.bitmessage.entity.Streamable;
+import ch.dissem.bitmessage.exception.ApplicationException;
 import ch.dissem.bitmessage.exception.DecryptionFailedException;
 import ch.dissem.bitmessage.utils.*;
 import org.slf4j.Logger;
@@ -123,7 +124,7 @@ public class CryptoBox implements Streamable {
             writeWithoutMAC(macData);
             return security().mac(key_m, macData.toByteArray());
         } catch (IOException e) {
-            throw new RuntimeException(e);
+            throw new ApplicationException(e);
         }
     }
 

core/src/main/java/ch/dissem/bitmessage/utils/Base58.java

@@ -18,6 +18,7 @@
 package ch.dissem.bitmessage.utils;
 
 import ch.dissem.bitmessage.exception.AddressFormatException;
+import ch.dissem.bitmessage.exception.ApplicationException;
 
 import java.io.UnsupportedEncodingException;
 
@@ -83,7 +84,7 @@ public class Base58 {
         try {
             return new String(output, "US-ASCII");
         } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e);  // Cannot happen.
+            throw new ApplicationException(e);  // Cannot happen.
         }
     }