Exception in thread "main" java.lang.AbstractMethodError: com.google.api.client.json.JsonFactory.createJsonGenerator(Ljava/io/OutputStream;Ljava/nio/charset/Charset;)Lcom/google/api/client/json/JsonGenerator;
	at com.google.api.client.json.JsonFactory.toByteStream(JsonFactory.java:167)
	at com.google.api.client.json.JsonFactory.toByteArray(JsonFactory.java:142)
	at com.google.api.client.json.webtoken.JsonWebSignature.signUsingRsaSha256(JsonWebSignature.java:634)
	at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.executeRefreshToken(GoogleCredential.java:378)
	at com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:489)
	at com.google.api.client.auth.oauth2.Credential.intercept(Credential.java:217)
	at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:859)
	at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequestWithoutGZip(MediaHttpUploader.java:545)
	at com.google.api.client.googleapis.media.MediaHttpUploader.executeCurrentRequest(MediaHttpUploader.java:562)
	at com.google.api.client.googleapis.media.MediaHttpUploader.executeUploadInitiation(MediaHttpUploader.java:519)
	at com.google.api.client.googleapis.media.MediaHttpUploader.resumableUpload(MediaHttpUploader.java:384)
	at com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:336)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:427)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
	at it.noovle.gawl.service.GoogleServiceJSON.executeWithBackoff_Internal(GoogleServiceJSON.java:152)
	at it.noovle.gawl.service.GoogleServiceJSON.executeUploadWithBackoff(GoogleServiceJSON.java:133)
	at it.noovle.gawl.storage.StorageService.insertObject(StorageService.java:475)
	at org.scube.utils.filemngr.google.CSClient.save(CSClient.java:116)
	at org.scube.utils.filemngr.FileManager.save(FileManager.java:220)
	at org.scube.utils.filemngr.FileManager.save(FileManager.java:257)
	at org.scube.utils.filemngr.FileManager.main(FileManager.java:42)