Build failure while pushing changes to openshift server

I'm trying to push my project to openshift server, it end up with this error while doing maven build on the server:

[INFO] Packaging webapp
[INFO] Assembling webapp [sani3ee] in [/var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/target/sani3ee]
[INFO] Processing war project
[INFO] Copying webapp resources [/var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/src/main/webapp]
[INFO] Webapp assembled in [112 msecs]
[INFO] Building war: /var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/webapps/ROOT.war
[INFO] WEB-INF/web.xml already added, skipping
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 31.677s
[INFO] Finished at: Sat Mar 07 14:01:05 EST 2015
[INFO] Final Memory: 9M/139M
[INFO] ------------------------------------------------------------------------
Preparing build for deployment
Deployment id is c2062771
Activating deployment
Starting PHPMyAdmin cartridge
Starting MySQL 5.5 cartridge
Stopping jbossews cartridge
Sending SIGTERM to jboss:514412 ...
Stopping PHPMyAdmin cartridge
Waiting for stop to finish
Waiting for stop to finish
Stopping MySQL 5.5 cartridge
Repairing links for 1 deployments
Building git ref 'master', commit 0d1853f
Using Maven mirror /var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo//.openshift/config/settings.rhcloud.xml
Apache Maven 3.0.4 (r1232336; 2012-12-18 14:36:37-0500)
Maven home: /usr/share/java/apache-maven-3.0.4
Java version: 1.7.0_75, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75/jre
Default locale: en_US, platform encoding: ANSI_X3.4-1968
OS name: "linux", version: "2.6.32-504.3.3.el6.x86_64", arch: "i386", family: "unix"
Found pom.xml... attempting to build with 'mvn --global-settings /var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo//.openshift/config/settings.rhcloud.xml clean package -Popenshift -DskipTests'
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Sani3ee 1.0.0-BUILD-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ sani3ee ---
[INFO] 
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ sani3ee ---
[debug] execute contextualize
[WARNING] Using platform encoding (ANSI_X3.4-1968 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources
[INFO] 
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ sani3ee ---
[WARNING] File encoding has not been set, using platform encoding ANSI_X3.4-1968, i.e. build is platform dependent!
[INFO] Compiling 58 source files to /var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] bootstrap class path not set in conjunction with -source 1.6
/var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/src/main/java/com/itworx/sani3ee/dao/favorite/FavoriteDaoImpl.java:[84,51] error: diamond operator is not supported in -source 1.6
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.823s
[INFO] Finished at: Sat Mar 07 14:35:34 EST 2015
[INFO] Final Memory: 8M/113M
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "openshift" could not be activated because it does not exist.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project sani3ee: Compilation failure
[ERROR] bootstrap class path not set in conjunction with -source 1.6
[ERROR] /var/lib/openshift/54f479214382ec83330000bd/app-root/runtime/repo/src/main/java/com/itworx/sani3ee/dao/favorite/FavoriteDaoImpl.java:[84,51] error: diamond operator is not supported in -source 1.6
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://ift.tt/1aCDfYM
An error occurred executing 'gear postreceive' (exit code: 1)
Error message: CLIENT_ERROR: Failed to execute: 'control build' for /var/lib/openshift/54f479214382ec83330000bd/jbossews

For more details about the problem, try running the command again with the '--trace' option.

I have no idea what's the problem here, I've been trying to fix this for a while now, it build fine on my local machine, also openshift recognized that it should be built using JDK 7, thanks in advance everyone :)