diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ContactHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ContactHelper.java
index e1efd5abc..77aa1a055 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ContactHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ContactHelper.java
@@ -303,10 +303,13 @@ public class ContactHelper {
         Cursor contactMasterKey = context.getContentResolver().query(contactUri,
                 new String[]{ContactsContract.Data.DATA2}, null, null, null);
         if (contactMasterKey != null) {
-            if (contactMasterKey.moveToNext()) {
-                return KeychainContract.KeyRings.buildGenericKeyRingUri(contactMasterKey.getLong(0));
+            try {
+                if (contactMasterKey.moveToNext()) {
+                    return KeychainContract.KeyRings.buildGenericKeyRingUri(contactMasterKey.getLong(0));
+                }
+            } finally {
+                contactMasterKey.close();
             }
-            contactMasterKey.close();
         }
         return null;
     }
@@ -537,7 +540,7 @@ public class ContactHelper {
                 KEYS_TO_CONTACT_PROJECTION,
                 KeychainContract.KeyRings.HAS_ANY_SECRET + "!=0",
                 null, null);
-        if (cursor != null) {
+        if (cursor != null) try {
             while (cursor.moveToNext()) {
                 long masterKeyId = cursor.getLong(INDEX_MASTER_KEY_ID);
                 boolean isExpired = cursor.getInt(INDEX_IS_EXPIRED) != 0;
@@ -565,6 +568,8 @@ public class ContactHelper {
                     }
                 }
             }
+        } finally {
+            cursor.close();
         }
 
         for (long masterKeyId : keysToDelete) {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ParcelableFileCache.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ParcelableFileCache.java
index 5a314ad0b..eabbf83b8 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ParcelableFileCache.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ParcelableFileCache.java
@@ -66,21 +66,24 @@ public class ParcelableFileCache<E extends Parcelable> {
 
         File tempFile = new File(mContext.getCacheDir(), mFilename);
 
+
         DataOutputStream oos = new DataOutputStream(new FileOutputStream(tempFile));
 
-        oos.writeInt(numEntries);
+        try {
+            oos.writeInt(numEntries);
 
-        while (it.hasNext()) {
-            Parcel p = Parcel.obtain(); // creating empty parcel object
-            p.writeParcelable(it.next(), 0); // saving bundle as parcel
-            byte[] buf = p.marshall();
-            oos.writeInt(buf.length);
-            oos.write(buf);
-            p.recycle();
+            while (it.hasNext()) {
+                Parcel p = Parcel.obtain(); // creating empty parcel object
+                p.writeParcelable(it.next(), 0); // saving bundle as parcel
+                byte[] buf = p.marshall();
+                oos.writeInt(buf.length);
+                oos.write(buf);
+                p.recycle();
+            }
+        } finally {
+            oos.close();
         }
 
-        oos.close();
-
     }
 
     /**